红色警告面板上PFD灯亮说明:
A、左侧PFD显示失效
B、右侧PFD显示失效
C、两边PFD显示都错误
D、两边PFD显示不一致
参考答案:C
He is able to ___________ new jokes about the people and things around him.
A.make out
B.come up with
C.let out
D.shout out
属肾上腺素能的受体是
A.M、N受体
B.M、N和α受体
C.M、N1和N2受体
D.α、β1和β2受体