冷媒充填过多（）
A.高低压表均比正常低
B.高低压表均比正常高
C.低压表比正常低，高压表比正常高
D.低压表比正常高，高压表比正常低
参考答案：B
.—Mum , I have finished my homework while you were out.
--_____a good boy.
A．It’s
B．How
C．This is
D．That’s
藏传佛教就是“藏密”吗？
