The boy has been going back home later __爱下问搜题

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问题选择题

The boy has been going back home later _____, which worries his parents.[ ]

A. as usual

B. than usual

C. as usually

D. than usually

答案

答案：B

单项选择题 A1型题

2：1等张含钠液的组成是（）

A.2份生理盐水，1份1.4％碳酸氢钠溶液

B.2份葡萄糖液，1份5％碳酸氢钠溶液

C.2份葡萄糖液，1份生理盐水

D.2份生理盐水，1份5％碳酸氢钠溶液

E.2份葡萄糖液，1份1.4％碳酸氢钠溶液

单项选择题

改压是改变（）等级的简称。

A.输出电压

B.供电电压

C.用电电压

D.变电电压