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问题 单项选择题

脱水器电流突然升高，电压归零，送不上电，检查绝缘棒与外部电路均无损坏，这种现象是（）。

A、电场波动

B、电场破坏

C、绝缘棒击穿

D、电极损坏

答案

参考答案：D

单项选择题

急性脓胸行胸腔穿刺时，每次抽脓量不超过（）

A.500ml

B.600ml

C.800ml

D.1000ml

E.1200ml
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单项选择题

Which of the following is NOT true of the Japanese language

A．It is divided into two types of phonetic alphabets.

B．It contains more katakana than hiragana.

C．Hiragana and katakana have the same number of sounds and characters.

D．It includes Chinese characters.
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