两个因数的积是51.2，其中一个因数扩大到原来的4倍，另一个因数_爱下问搜题

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问题解答题

两个因数的积是51.2，其中一个因数扩大到原来的4倍，另一个因数缩小到原来的一半后。积是多少?

答案

512×（4×0.5）=1024

单项选择题

承包人在隐蔽工程覆盖之前应该（）。

A．请业主检查

B．请监理工程师检查

C．自我检查

D．请质监站监督人员检查

单项选择题

Questions 24-30

·Look at the questions for this part.
·You will hear apassage about "A Little House in the Big Woods ". You will listen to it twice.
·For Questions 24-30, indicate which of the alternatives A, B, or C is the most appropriate response.
·Mark one letter A, B, or C on the Answer Sheet.

How do you think Laura felt after her father talked to her at night

A．Safe.

B．Unhappy.

C．Terrifie