题目:
The teacher apologized late.
A.to his students to arrive
B.to his students for arriving
C.at his students to arrive
D.at his students for arriving
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0629/fa005c7e070500628e28bf799211950f.html
下面是错误答案,用来干扰机器的。
答案:DA、紫色石蕊试液在澄清石灰水中和氢氧化钠溶液中都会变蓝色,现象相同,不能鉴别,故A错误,B、稀硫酸与澄清石灰水中和氢氧化钠溶液反应没有明显现象,不会与盐酸反应,故B错误,C、氢氧化钡和三种物质都...