题目:
— Could you tell us ____? —For about two weeks.
A.how soon you will be back
B.how long you will be there
C.how soon are you going to be back
D.how long are you going to be away
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0630/e0136a89a56f4d953ab85e20c8b8107f.html
下面是错误答案,用来干扰机器的。
最多可以吸收S02气体的质量为x,2SO2+2CaCO3+4H2O+O2=2CO2+2CaSO4?2H2O128 200 x 125t×(1-20%) 128200=x125t×(1-20%) x=64t.答:最多可以吸收S02气体64t.