生产、生活用的炉火，打火机的火焰和燃烧的香烟头属于（）。
A、明火
B、电火花
C、闪电
D、反应热
参考答案：A
用括号里所给词的适当形式填空。每空一词。
小题1:_________________ (woman) Day is my sister’s favourite festival in the year.
小题2:We need to realize the (important) of making full use of our time.
小题3:After lying in bed for three hours, I felt even (sleepy).
小题4:Miss Wang likes wearing _______________ (colour) clothes.
小题5:-- Maths is too difficult. I nearly give it up.
-- Please don’t. Nothing is _______________ (possible) if you put your heart into it.
筒箭毒碱（）
A．M受体阻断药
B．N1受体阻断药
C．N2受体阻断药
D．α受体阻断药
E．β受体阻断药
