下列情况下不需要矿井反风。（）
A．进风井发生火灾
B．回风井发生火灾
C．井底车场发生火灾
D．运输大巷发生火灾
参考答案：B
There are altogether eleven books on the shelf, ______ five are mine.[ ]
A. on which
B. in which
C. of which
D. from which
郑声的病因多为
A．心气大伤B．心气不足C．痰火扰心D．风痰阻络E．热扰心神
