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[单选题]

Plant experts found a way to direct salt away _________ the fruit of tomato plants.A、b

A.A.by

B.B.out

C.C.with

D.D.from

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发布时间：2022-12-04

更多“Plant experts found a way to direct salt away _________ the fruit of tomato plants.A、b”相关的问题

第1题

The children were found plant an apple tree.（)

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第2题

We have tested a plant's emissions of particulates and found the following data: Sampl

We have tested a plant's emissions of particulates and found the following data:

Sample number

Stack velocity, ft/s

Particle concentration, g/m³

0.50

0.30

0.70

Each sample represents the average over a 20-min period. What was the average particle concentration in this stack over the whole 60 min of this test？

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第3题

Many people, including some policemen, believe eye contact is a good test of honesty.

If someone can't look at you directly in the eye, then he or she is not playing honestly, they insist. After many experiments, however, a number of experts have found out that good liars can make false eye contact.

Eye contact, though not a sure sign of dishonesty, is a clear way to show interest in another person. When a person looks at you and continues to do so, you know his attention is placed on you. When he turns his head away, his mind is probably elsewhere. But there are exceptions. A shy person may have trouble making and keeping eye contact, no matter how interested he is in the other person. And certain nationalities, such as the British and Germans, are much less oriented to eye-to-eye contact than, say, the French and the Arabs.

Eye contact should be natural, not forced or overdone.

Have short periods of eye contact while you watch other parts of the person's face — especially the mouth. When the person smiles, be sure to smile back. But always make an effort to return your gaze to the person's eyes as she speaks. It is common to look up, down, and all around when speaking to others, and not have eye contact at all times.

Too much eye contact, especially if it is forced, can work against you. If you stare at a person, or leer in a suspicious way, the other person may feel uncomfortable and even suspicious about your intent. A fixed stare can seem like aggressive behavior. if it is a challenge as to who will look away first.

(1)Many people believe that eye contact is a sign of ___________.

A、honesty

B、dishonesty

C、attention

D、A and C

(2)According to the passage, which of the following statements is NOT true？

A、Eye contact is a way to show interest in another person.

B、When a person looks at you, his attention is placed on you.

C、When a person fails to make eye contact, he is definitely not interested in you.

D、It is common to look up, down, and all around when speaking to others.

(3)While we watch other person's face, we should have short periods of eye contact with, especially, other people's _____________.

A、eyes

B、nose

C、mouth

D、ears

(4)Which of the following statements is TRUE according to the passage？

A、Eye contact is not a good test of honesty.

B、Some people may have trouble making and keeping eye contact, no matter how interested he is in the other person.

C、If someone can look at you directly in the eye, he or she is playing honestly.

D、A number of experts have found out that no one can make false eye contact.

(5)This passage mainly discusses ________________.

A、how to test one is honest or not by the way of eye contact

B、how to make eye contact

C、how to avoid too much eye contact

D、the function of correct eye contact

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第4题

根据下面内容，回答题： Have you ever heard of a flower whose seeds are carried and spread b

根据下面内容，回答题：

Have you ever heard of a flower whose seeds are carried and spread by elephants？ The rafflesia， a rare blossom， is very unusual. Found in the rain forests of Sumatra， the rafflesia is the world"s largest flower， measuring three feet in diameter!

This giant flower is a parasite——it needs another plant to live on. It lacks the structures needed to survive alone， The rafflesia has no stem or leaves. It is all flower. It attaches itself to the roots of other plants and sucks their juices. The flower"s favorite home is the root of the vine， which grows above ground.

The rafflesia seems to burst right out of the forest floor. Its blossom weighs fifteen pounds ! It has thick， spotted petals that give off a rotten smell. The center is about the size of a household bucket.

After a rain， it may hold up to twelve pints of water!

After the rafflesia dies， it becomes a pool of thick liquid in which its seeds float. Elephants wandering through the forest step into the mushy pool， and the seeds glue themselves to their feet. As the animals stomp through the forest， their sticky feet pick up twigs and leaves. The elephants try to rid themselves of the sticky mess， in the same way people try to get bubble gum off their shoes. The elephants rub their feet against the roots of the vine. In no time， seeds left on the vine grow into more monstrous flowers !

Elephants help to________. 查看材料

A.provide food for the giant flower

B.water the rafflesia with their trunks

C.carry rafflesia seeds from one place to another

D.stomp out the awful smelling petals

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第5题

Global warming is already cutting substantially into potential crop yields in some countri

es—to such an extent that it may be a factor in the food price【C1】______ that have caused worldwide stress in recent years, researchers suggest in a new study. Wheat yields in recent years were down by more than 10 percent in Russia and by a few percentage points【C2】______ in India, France and China compared with【C3】______ they probably would have been without rising【C4】______, according to the study. Corn yields were【C5】______ a few percentage points in China, Brazil and France from what would have been【C6】______, said the researchers, whose findings were published in Fridays【C7】______ of the journal Science. Some countries saw small gains from the temperature increases, however. And in all countries, the【C8】______ carbon dioxide that humans are【C9】______ into the air acted as a【C10】______ that encouraged plant growth,【C11】______ some of the losses from rising temperatures caused by that same greenhouse gas. 【C12】______, the studys authors found that when the gains in some countries were weighed【C13】______ the losses in other countries, the overall global【C14】______ of climate change has been small so far: losses of a few percentage points for wheat and corn from what they would have been【C15】______ climate change. The general impact on production of rice and soybeans was【C16】______, with gains in some regions entirely counterbalancing losses in others. 【C17】______ the authors of the study pointed out that temperature increases were expected to【C18】______ in coming decades, making it likely that the challenges【C19】______ food production will grow in a era when demand is expected to【C20】_____ sharply.

【C1】

A．decreases

B．reductions

C．increases

D．additions

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第6题

"Freshman fifteen" is a term which means fifteen pounds, or about seven kilograms— the wei

ght students might expect to gain in their first year of college. People used to talk about the "freshman ten." Before that, it was the "freshman five." Are freshman more inflated, or just the expression？ The fact is, many young men and women do put on extra weight when they start college. Some schools that have done research on the issue including Cornell University in Ithaca, New York, have found that freshmen gain an average of four pounds during their first twelve weeks, the equivalent of two kilograms. If weight gain continues at this rate, how long before they put on fifteen pounds？ The answer is forty-five weeks, or almost a year. The next question is, why do so many freshmen gain weight？ The answers listed by experts are not so surprising. One is poor diet: College students often eat foods high in fat and sugar and starch with no parents around to say no to junk food. Students may also miss meals. They could be in class or studying or just ... busy. In any case, those who miss meals are more likely to overeat when they do have food. Also, freshmen often use food to put their mind at ease. They have college pressures to deal with. Not only that, many are living away from home for the first time. Another reason college students gain weight is that they often do not get enough exercise. Finally, there is something else that can add up to the "freshman five" or ten or fifteen, alcohol. Alcohol is high in calories and this is especially true of beer. And, no, freshmen are not supposed to be drinking, not unless they are twenty-one, the legal drinking age in America. For many college students, the extra weight they put on in their freshman year can be as hard to escape as term papers and final exams.

Paragraph 1 is centered on______.

A．why freshmen put on weight in college

B．why freshmen worry about their weight

C．how the "freshman fifteen" gets its name

D．how the "freshman fifteen" amazes freshmen

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第7题

governments，media and people around the world have become very worried about somethi

ng called sudan i (苏丹红1号).this chemical dye,_1_ in many food products, was said to _2_ cancer. newspapers told everyone to be careful andgovernments pulled this product off supermarket _3_.sudan i is a red dye used for _4_ oils, waxes, petrol, shoe and floor polishes(上光剂). scientists have found if used infood, it can _5_ an increased risk of cancer.on march 4, beijing’s food safety office said that it found the cancer-causing dye in meiweiyuan chili (红辣椒)sauce inthe city. now the _6_, famous us food company heinz, has recalled its chili sauces and chili oils sold in china.this follows news of food companies, including mcdonald ’s, _7_ some products in britain after finding the dye infrance was the first to _8_ the chemical dye in 2003. since then ，foods _9_ sudan i have been banned in the europeanunion._10_ experts say that people who have eaten any of the products should not _11_ too much. the cancer risk fromsudan i is very _12_，as only tiny amounts of it are used in foods.sudan i was banned from food products because experiments on rats _13_ that it could cause serious tumors (肿瘤).but，alan boobies，an expert in london，says there is little _14_ for the public to worry. he said that the levels fed tothe rats were in much，much bigger amounts _15_their body size. the amounts in food products eaten by humans are _16_.the rats that got tumors were given 30 milligrams of sudan i per kilogram of body weight ，every day for two years.animals given half the amount showed no _17_ of cancer.the tumors only _18_ in the rats after many months. for humans ，this means that if the dye were to have any _19_，it wouldtake around 20 years. professor boobis gives a _20_.”it’s just like the cancer risk linked with smoking just one cigarette in alifetime，”he said.

1. a. stuck b. stored c. found d. offered

2. a. produce b. cause c. make d. give

3. a. shelves b. cases c. storage d. tables

4. a. gluing b. gathering c. coloring d. conducting

5. a. allow for b. adjust to c. call for d. contribute to

6. a. seller b. producer c. customer d. farmer

7. a. breaking up b. putting out c. pulling away d. taking back

8. a. reject b. invent c. notice d. produce

9. a. causing b. including c. containing d. using

10. a. but b. also c. then d. so

11. a. complain b. disagree c. worry d. blame

12. a. high b. low c. common d. rare

13. a. guided b. guaranteed c. rated d. showed

14. a. concern b. reason c. cause d. right

15. a. compared to b. regardless of c. used to d. in spite of

16. a. none b. larger c. tiny d. more

17. a. signals b. marks c. symbols d. signs

18. a. produced b. developed c. made d. created

19. a. effect b. cause c. harm d. change

20. a. connection b. perception c. recognition d. comparison

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第8题

University of Arizona researcher Dr. William Rathji says that after a study based on lo

oking into garbage cans, the average family wastes at least $150 per year in food.

"Homemakers go out of their way to save pennies at the store and then don't realize that waste of edible (可食用的) foods adds up much more at home," said Dr. Rathji. He was one of about 100 food experts who met in Boise for a conference on food waste and ways to prevent it.

American families throw out between 8% and 20% of edible food at a cost of $4.5 billion per year. That's almost as much as the federal government spends every year for food stamps and child nutrition programs.

He found that food items which are costly and in short supply tend to be wasted more. During the 1973 meat shortage, meat waste increased to 9%, compared with 3% in 1974 and 1975. Sugar and sugar products waste jumped to 19% in 1975, when sugar prices doubled from the previous year.

Dr. Rathji theorizes that high prices force consumers to experiment, sometimes buy in large quantities. In the case of meat, sometimes low-priced cuts for unappetizing varieties are purchased, consumers then tend to waste more.

His theory is that the more variety in food bought, the more wasted. Regular bread is wasted at about a 10% rate, but specialty breads and rolls are wasted at a 20% rate.

If people are eating the same thing every day, they learn how to manage it. But if you're trying to pull something out of the cookbook every night, that's bound to be some waste.

Another finding is that lower income families waste less food than middle and upper income families. And the study found that dog food, which accounts for 8% of a shopping cart, is rarely wasted. Fresh produce and frozen items are more likely to be wasted.

The study also showed people with the most knowledge of safe, edible food waste the least. Much food is tossed out because a homemaker suspects it is spoiled when it is not.

1、Large quantities of food are thrown out because a homemaker____.

A、thinks they are not delicious

B、 says they taste bitter and hot

C、thinks they smell bad

D、 suspects they are spoiled when they are not

2、American families throw out between____of edible food every year.

A、5%～8%

B、 8%～10%

C、 20%～28%

D、8%～20%

3、When sugar prices doubled, waste of sugar____.

A、went down