子宫脱垂最多见于（）
A.肥胖者
B.分娩损伤者
C.营养不良者
D.雌激素水平低下者
E.雌激素水平增高者
参考答案：B
为什么发球队员击球时踏及端线即为犯规，而踏及发球区短线却不算犯规？
______ that Mr. Thomson got such rare fishes
A. When and where was it B. When and where it wasC. Was it when and where D. When and where were it
