问题
单项选择题
临产时的子宫收缩和疼痛，下列哪一变化最不可能产生（）
A.过度通气
B.每搏量增加
C.心排血量增高
D.血压升高
E.呼吸性酸中毒
答案
参考答案：E
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临产时的子宫收缩和疼痛，下列哪一变化最不可能产生（）
A.过度通气
B.每搏量增加
C.心排血量增高
D.血压升高
E.呼吸性酸中毒
参考答案：E
阅读下面短文，从短文后所给各题的四个选项（A、B、C、D）中选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。 Once again, I was in a new school. So was a girl in my class named Paris. That’s where the 31 ended. I was tall and she was small. I was one of the oldest in the class while she was the youngest. I was 32 and shy. She wasn’t. I couldn’t 33 her, considering her my enemy. But she wanted to be friends. One day, she invited me over and I said yes — I was too 34 to say no. Actually no one has invited me over to play before. But this girl, who wore the latest 35 , wanted to see me. She lived on the fourth floor in a two-room place with her mother, her stepfather, her two brothers and her sister. When we got to the room she 36 with her sister, she took out a big case of Barbies（芭比娃娃）- which was my next 37 . I would have thought she’d outgrown them. I has never played with them. But we sat on the floor of a walk-in cupboard laughing as we 38 crazy stories about the Barbies. That’s 39 we found out that we both wanted to be writers when we were older. We both had wile 40 . We had a great day that afternoon. Our jaws ached from 41 so much. She showed me her outfits, which had 42 come from a designer clothing store down the block. The woman who owned it used her 43 a model sometimes for her newspaper ads and gave her clothes 44 . Paris had the whole neighborhood 45 . The bookstore owners lent her fashion magazines, the movie theater gave her free 46 and the pizza place let her have free slices. Soon I was 47 in her magic world. We slept over at each other’s houses, spent every free moment together. My dark hair grew out and I learned to love being 48 . Paris, my first real friend since childhood, helped me 49 the through teenage years and taught me an amazing and very surprising thing about making friends: your “worst enemy” can 50 to be your best friend.
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