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问题 单项选择题

直接输血法输血150ml需加4%枸橼酸钠溶液()。

A．5ml

B．10ml

C．15ml

D．20ml

E．25ml

答案

参考答案：C

解析：[知识点] 静脉输血途径及操作要点

选择题
下列物体属于光源的是（　　）

A．反射阳光的平面镜

B．放电影时所看到的银幕

C．月亮

D．收看电视时看到的电视机屏幕
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选择题

—It was surprising that your brother should have________my sister the moment he saw her yesterday.

—Yes, especially since it had been 30 years since they last saw each other. [ ]

A. picked out  

B. figured out  

C. turned out  

D. worked out
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