制备维生素C注射液时应通入气体驱氧，最佳选择的气体为( )
A. 氢气
B. 氮气
C. 环氧乙烷
D. 二氧化碳
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头孢噻吩钠的氯化钠等渗当量为0.24，配制2％滴眼液100ml需加多少克氯化钠( )
A. 0.42g
B. 0.61g
C. 0.36g
D. 1.42g
---“Is Mary from New York City” ---“I don't know _______.”
A. from what city does she come from
B. from what city she come
C. what city does she come from
D. what city she comes from
关于输液叙述正确的是( )
A. 输液中应加抑菌剂
B. 输液是指由动脉滴注输入体内的大剂量注射液
C. 渗透压可为等渗或低渗
D. 输液的精滤目前多采用微孔滤膜
The reason why I didn't go to Shanghai was ________ a new job.
A. because of got
B. because I got
C. I got
D. that I got
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