肾上腺素升压作用可被下列哪类药物所翻转()
A.M胆碱受体阻断药
B.N胆碱受体阻断药
C.α-肾上腺素受体阻断药
D.β-肾上腺素受体阻断药
E.H-受体阻断药
参考答案:C
We six days a week, but now we only work five days.
A.used work
B.are used to work
C.used to working
D.used to work
请你将下图中的三孔插座用笔画线代替导线正确连入电路中.