题目内容

一切初等函数在其定义域内均是连续的。 ( )

A. 对
B. 错

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Jack is the only one of the classmates who ______ invited.

A. has
B. have
C. is
D. are

Is this book ______ I bought for you the day before yesterday?

A. which
B. that
C. ×
D. the one

I'll remember the time ______ we spent together in the country.

A. that
B. when
C. during which
D. at which

The professor made his first speech ______ he talked about some subjects the students were interested.

A. that
B. which
C. in which
D. of which

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