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问题 单项选择题

了解胎儿成熟度最常用的检查项目是

A．检测羊水中卵磷脂鞘磷脂比值
B．检测羊水中肌酐值
C．检测羊水中胆红素类物质
D．检测羊水中淀粉酶值
E．B型超声检查胎儿双顶径值

答案

参考答案：E

选择题

I am addicted to computers. I spend most of my time ________ the Internet.

A．getting in

B．reading

C．surfing

D．getting on
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选择题

He told the policeman that Kate ___________ near the lake at this time yesterday.

A．plays

B．is playing

C．has played

D．was playing
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