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[主观题]

（)half the cost of air travel our motor coach can take your group to their destinati

()half the cost of air travel our motor coach can take your group to their destination.

A、No less than

B、Not lest than

C、For more than

D、For less than

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发布时间：2022-12-03

更多“（)half the cost of air travel our motor coach can take your group to their destinati”相关的问题

第1题

The Panama Canal was constructed in 1915 ______ three hundred fifty million dollars.A．at h

The Panama Canal was constructed in 1915 ______ three hundred fifty million dollars.

A．at half cost to

B．at a cost of

C．at any cost

D．at all costs

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第2题

We must arrive there____ before midnight.

A、at all costs

B、at the cost

C、at half cost

D、to our cost

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第3题

Textbook prices are traditionally high. " Combined with the rising cost of tuition, the pr

ice of books for our students is just killing these kids," said Peter Jason, Ph.D. , a local community college professor. Adding to that problem, many college instructors change textbooks year after year: they either upgrade to a new edition or switch to an entirely different textbook. This further hurts students because if an instructor no longer uses a particular textbook, that book has no resale value. Students are one of the poorest groups of people in America. Almost half of them have at least one part-time job. In fact, some even have three jobs and still manage to have high grades and go to school full-time. So Dr. Jason decided to make life a little easier and a lot cheaper for his students by writing his own book on public speaking. He thinks that many books have an increased price because of bells and whistles: CD-ROMs, lots of color photographs, and lots of graphics. He talked to his students, and many of them, like him, prefer to keep things simple. They want to have a book which is brief and concise, not long-winded. A few years ago Dr. Jason finished his own textbook. " Compared to most other public speaking primers(启蒙书), mine is half the number of pages, and one-third the price. That is, $ 30 instead of $ 90. Plus, it is published in a three-ring binder format. So, when I wrote a second edition last year, students only had to buy the 35 new pages and delete 35 of the original pages. For only $ 7.00, they had upgraded to the new edition. I ve had great feedback from my students about this loose-leaf concept. Maybe the word will get out, and more writers and publishers will try it," said Dr. Jason.

What can we learn from Paragraph 1？

A．College textbooks are way too expensive.

B．Students don"t like to sell their own textbooks.

C．Students ask their instructors not to use any textbooks.

D．Some students were rejected by their instructors.

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第4题

The timing of flu season is a little hard to predict. Part of what makes it unpredictable

is that scientists still don t understand exactly why we have one at all. There have been lots of theories: One theory is that people spend more time indoors, with the windows closed, breathing each other s air. Other scientists have argued that cold of winter weakens our immune systems. A third theory is that the flu virus lives in the cold, dry air, but suffers in the warm, humid air. For a while, scientists had a hard time testing these theories: they needed to run experiments, but researchers aren t allowed to infect humans with illnesses, and most lab animals arent affected by the flu the same way people are. In 2007, a medical researcher named Peter Palese found an 80-year-old journal article that reported that guinea pigs (豚鼠)get infected and pass on the flu just like humans. Palese decided to test Theory 3. The research team led by Palese ran several experiments and in each experiment, they injected half the guinea pigs with influenza A (the common flu), and put them in a box next to a box of uninfected animals. At a temperature of 41 degrees, all four of the exposed guinea pigs caught the flu, but when Palese repeated the experiment at 68 degrees, only one of the animals was infected. And when he ran the test at 86 degrees, none of the exposed animals got sick. The researchers also ran experiments where they varied the humidity in the room but kept the temperature constant: the drier the air, they found, the more animals got sick. Palese s study showed that the influenza virus does spread more effectively in cold, dry air.

What does Paragraph 3 mainly discuss？

A．The direction for future research.

B．The necessity of running more tests.

C．The difficulty of testing the theories.

D．The cost of animal experiments.

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第5题

half value layer

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第6题

Teay spent _______traveling around the world by bike.

A.a year and a half