受卵巢激素影响发生周期性变化的是
A．以上都不是
B．子宫内膜功能层
C．子宫浆膜层
D．子宫内膜基底层
E．子宫肌层
参考答案：B
He appeared to be an expert in this field of work. _____, he knew nothing about it. [ ]
A. So far
B. As a matter of fact
C. In other words
D. At all
苯酐包装编织袋内袋宽度为（）mm。
A.525
B.535
C.545
D.555
