阅读下面的程序段:执行上面的三重循环后,a的值为() A.3 B.9 C.14 D 发布时间:2018-03-28 23:49 │ 来源:www.tikuol.com 题型:单项选择题 问题: 阅读下面的程序段:执行上面的三重循环后,a的值为() A.3B.9C.14D.21
题型:单项选择题 通过下表,可以总结出“在原子里质子数等于电子数”.原子种类氢碳氧钠铁质子数1681126中子数0681230核外电子数1681126相对原子质量112162356还可以总结出:(1)______.(2)______.(3)______.(4)______. 查看答案
题型:单项选择题 — I am so sorry to have come late for the meeting. — It is not your fault. With _______ rush-hour traffic and ______ heavy rain, it is no wonder you were late.[ ] A.a; a B. the; the C. /; / D. /; a 查看答案
题型:单项选择题 The CCTV Spring Festival Cala Evening annually since 1983 and it is still very popular with most Chinese.A.was ranB.is runningC.had been runD.has been running 查看答案