某同学参加学校组织的秋季越野赛后,感觉浑身酸痛,并伴随着大量出汗等.下列有关描述正确的是( )
A:剧烈运动使其体内产生了大量乳酸,致使其血浆pH显著下降
B:此时应及时补充盐水并注意适当散热,以维持水盐与体温平衡
C:由于能量大量消耗,其血液中的血糖浓度会大幅度下降
D:由于其体内内环境pH发生变化,所以细胞代谢发生紊乱
阅读短文,从方框中选择适当的单词填空。
The London Olympic Games is still a few months away. But in the US, kids had ____ in a mini-Olympics competition.Michelle Obama(米歇尔.奥巴马), the First Lady of the US, held the games. Children played basketball ____ four-time gold medalist(金牌得主) Lisa Leslie. They ____ played soccer and tennis with famous players. The ____ of the competition was to teach kids the Olympic spirit(精神). “The most important thing is not to win, ____ to take part.” The First Lady said. How meaningful it is!
形近字组词
呛____ 恬____
伦____ 甜____
为了估测大气压究竟有多大,晓彤和小雪正在用如图所示的装置按如下步骤进行分组实验,用一个水桶向吸盘下的水桶中注水,至吸盘从水平光滑的水平板上脱落为止.器材还有测人质量的人体秤,刻度尺及三角板.
用反证法证明“x>1”时应假设( )