输卵管的粘膜皱襞在()最发达,此处也是()发生的部位。
参考答案:壶腹部、受精
—How long do you suppose it is _______he arrived here?
—No more than half a week.[ ]
A. when
B. before
C. after
D. since
台式PC机中,挂在主机外面的MODEM,与主机连接的接口标准是______。
A.SCSI
B.IDE
C.RS-232-C
D.IEEE-488