内陷正虚邪盛用何方（）
A．外吹乳痈
B．内吹乳痈
C．不乳儿乳痈
D． * * 破裂乳痈
E．席风呵乳
参考答案：B
--- Your classroom is very clean.
--- Sure. It ________ after school every day.
A．is cleaned
B．cleans
C．cleaned
D．is cleaning
夏天在露天焊接时，应有（）措施.
A、可靠的安全帽
B、遮风挡雨
C、防日晒
D、绝缘木板
