子宫以外的子宫内膜异位症，最常见部位是
A．壁层腹膜
B．盆腔腹膜
C．直肠子宫陷凹
D．宫骶韧带
E．卵巢
参考答案：E
I must be off now, but I hope we can _____ each other _____ letter. [ ]
A. communicate to; by
B. communicate with; by
C. communicate to; in
D. communicate with; in
根据下列图形，读数正确的是（）。
A．磁方位角是300°
B．磁方位角是120°
C．磁方位角是0°
D．磁方们角是180°
