综采工作面液压泵向支架供液,其压力不得小于()MPa。
A.12
B.24
C.30
D.8
参考答案:C
预习 2012年人教版九年级英语下册Unit14Self-check and Reading 的Reading部分,判断正( T )误 ( F ) 。
( ) 1. Robert Qian is a Chinese Canadian.
( ) 2. The program began in 1990.
( ) 3. Most of overseas Chinese students in the program have visited China before.
( ) 4. The program is organized by the local government of Guangdong Province.
下列药,擅治阳明经头痛的是
A.羌活B.葛根C.白芷D.柴胡E.细辛