大脑皮质的听觉性语言中枢位于优势半球的
A．颢上回后部
B．颞中回后部
C．颞下回后部
D．颞横回
E．角回
参考答案：A
I got an e-mail from Liu Xin, ___ said she was going abroad for further study.
A．who
B．she
C．which
D．it
辅助隔爆水棚的用水量按巷道的断面积计算，不得小于（）L/m2。
A.50
B.200
C.300
D.400
