双人复苏时,心脏按压与口对口人工呼吸的比例是A.4:1 B.5:1 C.6:1 D. 发布时间:2017-06-13 09:14 │ 来源:www.tikuol.com 题型:单项选择题 问题: 双人复苏时,心脏按压与口对口人工呼吸的比例是A.4:1B.5:1C.6:1D.7:1E.15:2
题型:单项选择题 看看你的应变能力,用所给单词的适当形式填空。1.It's time ____ (have) supper.2.Let's ____(go) to the zoo.3.Stop ___ (watch) TV. Time for school.4.I ___ (have) maths tomorrow.5.I love ____(learn) about his family. 查看答案