单项选择题

A、正确
B、错误

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单项选择题

Which of the following could be used as a motivation to do our assignments? ine]>
A、A. Remembering our urgent tasks.
B、B. Any activities we’re eager to do.
C、C. Taking a break in the afternoon.
D、D. The promise to study efficiently.

单项选择题

试生产前的系统吹扫冲洗前，应在排放口设置警戒区。（）

A.正确
B.错误