—________,because she fell off her bike and hurt her legs
A:Yes,she
B:No,she didn't
C:Yes,she didn't.
D:No,she did
如果把自然水里溶解的气体收集起来,分析的结果是氧气的体积分数大于21%,而氮气的体积分数小于78%,此现象说明____
邓小平说:"牢牢地把握'一个中心、两个基本点'的基本路线,一百年不动摇,国家就能长治久安,中国就大有希望。"