已动作过的热线圈可加热再使用，一般不宜超过（）次。
A.3
B.5
C.10
D.6
参考答案：A
---You look so tired and ____, John.
---Yes, I had my PE lesson just now. I’d get some water to drink.
A．stressed
B．boring
C．athletic
D．thirsty
公共紧急状态
