The house _____ big trees _____ an old m

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问题选择题

The house _____ big trees _____ an old man, who died several years ago.

A. is surrounded with; belong to
B. surrounding; belonging to
C. surrounded by; belongs to
D. surrounded; was belonged to

答案

答案：C

单项选择题

临边作业的防护栏杆应自上而下用绿色密目式安全立网封闭，或在栏杆下边设置严密固定的挡脚板或挡脚笆。挡脚板与挡脚笆上如有孔眼，应至多不大于（）mm。

A.15

B.25

C.30

D.40

单项选择题

细集料含泥量试验（筛洗法）两次试验结果之间的差值应符合什么要求？（）

A.两次结果的差值不超过0.1％

B.两次结果的差值不超过0.2％

C.两次结果的差值不超过0.3％

D.两次结果的差值不超过0.5％