计算：a34•a-12÷3a4(a＞0)=______．_爱下问搜题

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问题填空题

计算：a

3

4

•a-

1

2

÷

3	a4

(a＞0)=______．

答案

当a＞0时，a

3

4

•a-

1

2

÷

3	a4

=a

3

4

•a-

1

2

• a-

4

3

=a

3

4

-

1

2

-

4

3

=a-

1

12

故答案为a-

1

12

填空题

声强法测量对（）环境无特殊要求，并可在（）测量，既方便又迅速。

单项选择题

A vessel with a large GM will（）.

A.have a small amplitude of roll in heavy weather

B.tend to ship water on deck in heavy weather

C.be subject to severe racking stresses

D.be less likely to have cargo shift