下列各项，适用治疗虚热证的是
A．寒者热之
B．寒因寒用
C．阳病治阴
D．阴病治阳
参考答案：C
红外线是一种看不见的光，通过红外线的照射，可以使物体的温度____，任何物体均可以辐射红外线，温度较高的物体发出的红外线也____。
Mike ______ his computer and checked his e-mail. [ ]
A. turned on
B. turned off
C. turned up
D. turned down
