He was annoyed for _________ outside whi_爱下问搜题

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问题选择题

He was annoyed for _________ outside while his wife was shopping with the key.[ ]

A. being kept

B. keeping

C. kept

D. to be kept

答案

答案：A

单项选择题

明渠流动为急流时，( )(υ为平均流速，c为微波波速，h为水深，h_c为临界水深)。

A．Fr＞1
B．h＞h_c(h_c为临界水深)
C．υ＜c
D．υ=c

多项选择题

管理标准中，规范性一般要素包括：（）。

A.前言

B.名称

C.范围

D.规范性引用文件