题目内容

初等函数在其定义域内一定可导.

A. 对
B. 错

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These winds blow much more strongly, so they can produce______ energy.

A. be used as
B. a huge amount of
C. from all over the world
D. a key to

When you first meet, he seems______ quite like his father, but the more you get to know him, the more you realize he is most like his mother.

A. in some way
B. open the door to
C. be used as
D. in one's own country

For people coming from different countries, understanding each other's culture is______ good communication.

A. a huge amount of
B. open the door to
C. in some way
D. a key to

A lot can be said for traveling abroad, but there is so much to see and learn______ too.

A. in one's own country
B. a huge amount of
C. open the door to
D. in some way

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