卸氨结束，由运行值班人员和槽车人员（）确认安全后，槽车方可启

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问题单项选择题

卸氨结束，由运行值班人员和槽车人员（）确认安全后，槽车方可启动离开装卸台。

A、运行值班人员确认

B、槽车人员确认

C、运行值班人员和槽车人员其中一人确认即可

D、运行值班人员和槽车人员共同确认

答案

参考答案：D

选择题

—Our environment is getting worse than before.

—You're right. But people have done more and more

useful things to protect (保护) the earth since Earth Day _____. [ ]

A. is started

B. was started

C. has started

多项选择题

舌黏膜 * * 包括

A．菌状 * *

B．片状 * *

C．丝状 * *

D．轮廓 * *

E．叶状 * *