患者人工流产后长期闭经,而基础体温为双相,其最可能原因是上述哪组子宫内膜遭到破坏:
A.雌激素B.孕激素C.雄激素D.促卵泡素E.黄体生成素
参考答案:C
My mother never goes to work late, __________? [ ]
A. does she
B. doesn't she
C. is she
D. isn't she
下列细菌引起菌痢症状最严重的是()。
A.痢疾志贺菌;
B.福氏志贺菌;
C.鲍氏志贺菌;
D.宋内志贺菌;
E.以上都不对。