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问题 单项选择题

乙醇擦浴的浓度为（）。

A、95% 

B、70% 

C、50% 

D、25%

答案

参考答案：D

判断题

100 Sewing Machines under the trade term FOB Shanghai are being shipped onto the ship and the rope breaks．The goods finish up at the bottom of the dock and divers are sent down．The recovery and repair of goods costs a great of money，The seller should be responsible for the additional payment．( )
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单项选择题 A1型题

为防止一氧化碳急性中毒，生产环境中CO的浓度不应超过（）

A.10mg/m3

B.20mg/m3

C.30mg/m3

D.40mg/m3

E.50mg/m3
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