若sin(α-π4)cos2α=-2，则sinα+cosα的值为（ ） A．-72

下列主要用于指导ARDS机械通气参数设置的呼吸环是（）

A.流速-容积环

B.动态压力-容积环

C.静态压力-容积环

D.流速-时间环

E.压力-时间环

换肤后不足（）者，禁止面部刮痧操作。

A.十五天

B.一个月

C.四十五天

D.二个月

大修时，应由锅炉检修人员确定高温，低温过热器和再热器的割管位置。

ADC256第一图像转印辊Y、M、C、K同时保持在缩回位置。

Questions 1 to 5 are based on the following conversation.

A. They cannot become part of the work force.
B. They won’t be an added asset as they are today.
C. They will have to get over their fear of these skills.
D. They are going to be at a disadvantage.