子宫颈外形恢复至非妊娠状态于产后()
A.1周
B.2周
C.4周
D.6周
E.10周
参考答案:A
解析:产后1周,子宫颈外形及子宫颈内口恢复至未孕状态;
— Who would you rather _____ your graduation ceremony tomorrow, your parents or friends?
— All of them. [ ]
A. will have attended
B. have attended
C. attended
D. to attend
()筒体常用于直径较大的化工高压容器的制作。
A、单层卷焊式
B、整体锻造式
C、锻焊式D、铸-锻-焊式