为减少汞蒸发,可在汞液面上覆盖除()外的三种液体之一。
A、10%硝酸
B、甘油
C、5%Na2S•9H2O
D、水
参考答案:A
—What if I move the picture over there?Do you think it’ll look better?
—________.Let me give you a hand.[ ]
A. I don’t agree with you
B. That’s right
C. I couldn’t agree more
D. With pleasure
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