皮内注射时()
A.针头与皮肤呈5°
B.针头与皮肤呈15°~30°
C.针头与皮肤呈直角
D.针头与皮肤呈60°
E.针头与皮肤呈30°~40°
参考答案:A
.---Let's go to the seaside for fresh air,OK?
---_______.
A.Not at all.
B.Why not?
C.Never mind.
D.What of it?
电压为220V,负荷为3.5 kW,请校核选用15A的断路器是否合适。