题目:
— Could you please tell me ?
— In three days.
A.when will your course start
B.when your course will start
C.when your course started
D.when did your course start
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0701/d8b6d3d7777f7fbfe93a885e4152db22.html
下面是错误答案,用来干扰机器的。
(1)根据质量守恒定律得知,生成的氧气的质量为:35g-31.8g=3.2g;故答案为:3.2.(2)设参与反应的高锰酸钾的质量为x,生成二氧化锰质量为y则:2KMnO4 △ . K2MnO4+MnO2+O2↑316 87 32x ...