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[主观题]

When a strong acid dissolves in water, there are ions in the solution afterward. When a soluble meta

l hydroxide dissolves in water,there are ions in solution afterward. Besides the difference in the identity of the ions, what is the basic difference in these processes？

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发布时间：2022-12-03

更多“When a strong acid dissolves in water, there are ions in the solution afterward. When a soluble meta”相关的问题

第1题

______ retain their fluid state when exposed to oxygen, but when squeezed into thin joints that bloc

k the oxygen, they set up into hard, strong adhesives.

A) Hot-melt adhesives

B) Loss-of solvent adhesives

C) Anaerobic adhesives

D) Two-part mix adhesives

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第2题

Music was found to have strong emo______ effect and the individual preferences and experiences of pa

tients need to be taken into account when programming music in hospital.

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第3题

Anaerobic adhesives set up into hard, strong adhesives when ______. A．The two parts of resin and ca

Anaerobic adhesives set up into hard, strong adhesives when ______.

A．The two parts of resin and catalyst are mixed

B．Squeezed into thin joints which block the oxygen

C．The solvents evaporate or penetrate porous adherends

D．The heat source is removed

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第4题

Simile is applied in （).

A、In politics, a reformer may have just as strong a love of power as a despot.

B、And is it not, perhaps, a drug which—like opium—has to be taken in continually stronger doses to produce the desired effect？

C、When the Arabs, who had been used to living sparingly on a few dates, acquired the riches of the Eastern Roman Empire…

D、What he thought was, “I must have a Navy as good as Grandmamma’s.”

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第5题

According to the passage, you should thank others for their help, because ______.A．they'll

According to the passage, you should thank others for their help, because ______.

A．they'll spend m6re time and energy to help you

B．they'll return the favor when needing help

C．they'll think what they've done is worthy

D．they'll make a strong alliance with you

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第6题

Why can't you see light when you look at a black hole？A．Because most black holes are so fa

Why can't you see light when you look at a black hole？

A．Because most black holes are so far away.

B．Because the gravity of a black hole is so strong that it sucks？ the light inward.

C．Because as the star's gases burn, it stops giving off heat and light.

D．Because as a star cools, its outer layers pull in toward its center.

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第7题

Even if you are a good high－jumper, you can jump only about seven feet off the ground.

Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you.

Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls(旋转) around.

Then, can we get away from the earth and go far out into space？ Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape the earth’s gravity and carry you into space.

(1) In this passage, the word “gravity” means_______.

A.the pull of everything.

B.the force of attraction(吸引) among objects.

C.the force which attracts objects towards the centre of the earth

D.the force which attracts the earth towards the sun.

(2) When you slip you always fall to the ground because_______.

A.the earth always turns round.

B.the earth has gravity

C.the earth’s gravity is greater than your weight.

D.you are careless.

(3) Gravity is strong that_______.

A.it can throw a ball into the air.

B.it makes you jump only seven feet.

C.it can let you fly away from the earth.

D.it can keep everything on earth.

(4) Because of gravity,_______.

A.water flows everything.

B.we can go everywhere by ship.

C.water always flows downwards.

D.fish can live in water.

(5) We can get away from the earth by spaceship because_______.

A.the spaceship goes very fast.

B.the earth can’t pull the spaceship.

C.the spaceship has a strong force.

D.the spaceship can jump higher than other things.

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第8题

A British teenager has become a multi-millionaire after selling an application software he

created to web giant Yahoo. The deal is reported to be worth up to 30 million dollars and includes a position working on Yahoo s future mobile projects. Nick D Aloisio, 17, started his Summly app (应用软件)when he was just 15. He was studying for school exams and became frustrated at ploughing through lengthy online articles. He created the app to summarize long reports so that people could more easily understand the content. Yahoo s boss of mobile content development Adam Cahan said: " It started with an insight that we live in a world of constant information and need new ways to simplify how we find the stories that are important to us, at a glance." Nick taught himself to write software when he was 12 years old. He developed the bulk of his Summly app in his bedroom. He launched his app when he was 15 and it soon attracted over 1.5 million dollars of investment, including from Hollywood stars Ashton Kutcher and Stephen Fry. The purchase by Yahoo makes the British teen one of the world s youngest self-made millionaires. He believes his connection with Yahoo is perfect, saying: "To me, Yahoo is the best company to be joining right now because it s one of these classic Internet companies. With new leadership from Marissa Mayer, Yahoo has a strong focus on mobile and product, and that s the perfect match for Summly." He says his parents will help him manage the financial windfall (飞来之财)but that he was not driven to the deal by dollar signs. "Technology has really been the driver behind this whole deal," he said. "I cant wait to see how it plays out at Yahoo."

The British teenager has______ .

A．set up a software company

B．saved Yahoo from its decline

C．become wealthy with his app

D．developed a new model of mobiles

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第9题

nicotinic acid

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第10题

酸雨（acid rain)

酸雨(acid rain)