《工业金属管道工程施工及验收规范》对钢制管道安装工艺的基本规定中，规定穿楼板套管应高出楼面()。
A. 30 mm
B. 40 mm
C. 50 mm
D. 60 mm
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A．If Phil is lucky, he might get a scholarship.B．There is no way in which Phil can win
A. If Phil is lucky, he might get a scholarship.
B. There is no way in which Phil can win a scholarship.
C. Phil is not going to chance his luck and try for a scholarship.
D. Phil is not being given a chance to get a scholarship.
A．She will type it next week.B．She would rather work on it than do nothing.C．It took h
A. She will type it next week.
B. She would rather work on it than do nothing.
C. It took her an entire week to type it.
D. She still hasn't quite finished with it.
Internet was originally designed ______.
A. to promote education
B. to distribute news and comment
C. to relieve people of worries
D. to publicize political beliefs
A．The people of the Northeast.B．The significance of the Northeast.C．The development of
A. The people of the Northeast.
B. The significance of the Northeast.
C. The development of the United States.
D. The location of the nation's capital.
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