施工过程中由偶然性因素引起的质量波动，一般属于( )。A．系_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

施工过程中由偶然性因素引起的质量波动，一般属于( )。

A．系统波动

B．偶然波动

C．正常波动

D．非正常波动

答案

参考答案：C

单项选择题

Questions 14-23

·Look at the ten statements for this part.
·You will hear a passage about "A Research on Sleep ". You will listen to it twice.
·Decide whetheryou think each statement is right(R), wrong(W) or not mentioned(NM).
·Mark your answers on the Answer Sheet.

You stay at the deep fourth stage all the rest of the night.

A．Right

B．Wrong

C．Not Mentioned

单项选择题

不属硬膜外单次吗啡镇痛并发症的是：（）。

A.恶心、呕吐

B.皮肤瘙痒

C.尿潴留

D.循环抑制

E.延迟性呼吸抑制