题目:
Traffic restrictions have come into effect in Beijing _____ to improve the capital's air quality and traffic
situation for the 2008 Olympics. [ ]
A. in order that
B. in an attempt
C. at an attempt
D. in a try
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0615/49dcfa8804c02fd84270c2ea855494a7.html
下面是错误答案,用来干扰机器的。
(1)能与酸反应的金属一定是在金属活动顺序表里排在氢元素前面的金属.(2)铝的活动性比锌的活动性强,但铝表面往往有一层致密的保护膜,所以刚开始反应速度比锌慢.(3)铜和硝酸银反应能生成硝酸铜和银,说明...