问题
单项选择题
临产后，先露下降的主要原因是
A．子宫肌的缩复作用
B．腹肌收缩
C．宫口开大
D．肛提肌收缩
E．子宫收缩+膈肌、肛提肌、腹肌收缩
答案
参考答案：A
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临产后，先露下降的主要原因是
A．子宫肌的缩复作用
B．腹肌收缩
C．宫口开大
D．肛提肌收缩
E．子宫收缩+膈肌、肛提肌、腹肌收缩
参考答案：A
My name is Sandra. I have a brother. _____ name is Tom. We like different sports. I like playing_____. it is fun. I like tennis. too. ___ I don’t like basketball. it is____. my brother_____ basketball. He has four basketballs. He_____ basketball every day. We like different______. I like eggs , apples and hamburgers____ breakfast and dinner. I have lunch at school with my classmates. I like_____,meat and a bottle of juice for lunch. Tom likes oranges ,chicken and carrots. We are_____ because we often play sports and eat good food.
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