题目内容

I can’t understand this passage _______ there are no new words in it.

A. if
B. because
C. though
D. an

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There is air _______ water on the moon.

A. and
B. or
C. so
D. yet

The street was wet, _______ it rained last night.

A. because
B. as
C. for
D. since

That was our first lesson, _______ she didn’t know all our names.

A. for
B. but
C. so
D. or

引入多道程序设计的主要目的在于()。

A. 提高实时响应速度
B. 减少了处理器的空闲时间,提高了处理器的利用率
C. 有利于代码共享
D. 减少存储器碎片

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