口对口人工呼吸法即使操作正确,吸入氧浓度也常低于()
A.21%
B.18%
C.15%
D.12%
E.10%
参考答案:B
根据汉语提示完成句子
1. 这里有两本书,你可以拿任意一本.
There're two books here. You Can take __________ __________ __________.
2. 他的健康受益于经常的锻炼.
His health __________ __________ exercising often.
3. 应当让孩子们轻松自如地学习.
Children should be allowed to study __________ __________ __________ __________.
4. 除了吉他外,她还学习拉小提琴.
__________ __________ __________ guitar, she learns to play the violin.
5. 谢谢你的好意,我能独立完成这项任务.
Thanks for your kindness, I Can finish the task __________ __________ __________.
某窗体中有一命令按钮,在窗体视图中单击此命令按钮打开一个查询,需要执行的宏操作是 【9】 。