We should never break into others’ conversation.
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The cubicle can be made a nice place for coworkers to swing by.
A. 对
B. 错
The clean desk policy means desks will be cleared up by cleaners regularly.
A. 对
B. 错
在乙酰水杨酸制备实验中,所有的仪器(水浴除外)都必须是干燥的吗?
A. 是
B. 不是
C. 部分是
D. 不确定
4-1-社会环境不包括政治环境。
A. 对
B. 错