当两个或两个以上的可燃气探测器探测到50％高爆限浓度的可燃气时_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

当两个或两个以上的可燃气探测器探测到50％高爆限浓度的可燃气时，DCS屏幕上显示（）

A、GAS is Lower

B、GAS is Hight

C、GAS is Highter

D、其它

答案

参考答案：C

单项选择题 A1/A2型题

制定拔牙方案的基本原则除外（）

A.拔牙保守原则

B.就近拔牙原则

C.病牙优先原则

D.左右对称原则

E.上下协调原则

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.

Muscular relaxation, temperature drop and breath regularity are characteristics of Stage 4 sleep.

A. Right

B. Wrong

C. Not Mentioned