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第1题

Nobody but Smith and John ( ) in the lab yesterday. A. were B. had been C. was be D. was
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第2题

口服补液盐(ORS液)的张力约为( )(本题3.0分) A. 等张 B. 1/2张 C. 2/3张 D. 1/4张
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第3题

属于非电解质溶液的是( )(本题3.0分) A. 10%氯化钙 B. 10%氯化钾 C. 0.9%氯化钠 D. 10%葡萄糖液
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第4题

If you live in the country or have ever visited there, ( ) are that you have heard birds singing to welcome the new
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