In the passage, the sentence "Different parts of the state have different kinds of weather" means ______.
America is very big
B. Laredo is very hot
C. Texas is far from Alaska
D. Texas is very big
弗鲁姆的期望理论避免了马斯洛和赫茨伯格研究方法中某些简单化的缺陷，更切合现实情况。()
A. 正确
B. 错误
What is the main reason that we cannot use all of the earth's water？
A small amount of water is not for drinking.
B. Most of it has been polluted.
C. About 97 percent of it is seawater.
D. Fresh water is still enough for us.
5英寸软盘的写保护口开着时()。
A. 只能读，不能写
B. 只能写，不能读
C. 既能写，又能读
D. 不起任何作用
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