题目内容

下列碳酸盐中,分解温度最低的是( )。

A. Na2CO3
B. K2CO3
C. ZnCO3
D. MgCO3

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Choose the answer that correctly interprets the sentence from the text.1.One night, I didn’t turn off the water fast enough to her liking. (Para. 1)

A. One night, she wasn't pleased with the way I turned off the water, because she thought I didn't do it fast enough.
B. One night, I didn't turn off the water as fast as she did; it seemed that she liked doing it herself.

2.We need to conserve our resources to buy ourselves time so scientists can find new solutions to our problems.(Para. 2)

A. We should conserve our resources. If we do so the money we save will be used to find new solutions to our problems.
B. We should conserve our resources. If we do so the resources will probably last long enough for scientists to find new solutions to our problems.

3.His list, in descending order of importance, was: energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population. (Para. 4)

A. His list contains ten items: energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population. They are arranged in such a way that each item is more important than the one that follows it.
B. The ten items on his list---energy, water, food, environment, poverty, terrorism and war, disease, education, democracy, and population---are gradually losing importance now.

4.The reason energy and water sit at the top, ahead of food and poverty, is that addressing them makes subsequent problems easier to deal with. (Para. 5)

A. Energy and water are the top two problems on the list. The reason is that if we start to solve these problems, the other problems that follow them on the list, such as food and poverty, will be easier to deal with.
B. Energy and water are listed as the two problems more important than food and poverty. This is because once we start working on them, addressing food shortage and poverty will be easier later on.

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