People were not allowed to enter the rea_爱下问搜题

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问题选择题

People were not allowed to enter the reading room because it _______.

A. had been painted
B. was being painted
C. was painting
D. painted

答案

答案：B

单项选择题

信息的( )是科学咨询和决策的基础。

A．科学性和完整性

B．综合性和有效性

C．完整性和有效性

D．科学性和综合性

单项选择题

企业负责人应每月至少参加（）次班组安全活动。

A、2

B、1

C、3