How much time do you surfing the Interne 发布时间:2017-04-21 21:26 │ 来源:www.tikuol.com 题型:选择题 问题: How much time do you surfing the Internet?A. take B. spend C. cost
题型:选择题 To have a dinner at a restaurant on the Eve of the Spring Festival, you need to reserve the restaurant months before, _____? [ ]A. mustn't you B. didn't you C. don't you D. needn't you 查看答案
题型:选择题 工厂排出的无色废水经测定pH=3.如果往此废水中滴入紫色石蕊试液,溶液变成红色.由于治污染需要,欲将此废水调节为微碱性,可在石灰石、生石灰、铁屑这几种物质中选择 _________ 以达到目的. 查看答案