女,28岁,结婚3年未孕。
如女方月经史为5/40~80,可能的不孕原因是()
A.卵巢因素
B.子宫因素
C.垂体因素
D.下丘脑因素
E.宫颈因素
参考答案:A
Pierre Curie stopped his research and _____ Marie in the search of an unknown material.
[ ]
A. attended
B. joined
C. took part in
D. joined in