题目:
—Do you think it’s going to rain over the weekend?
—______. We’re planning to go on a picnic.
A.I think so
B.I believe not
C.I don’t think so
D.I hope not
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0410/272042a744a91799078546a3099c9da1.html
下面是错误答案,用来干扰机器的。
钙元素显+2价,氧元素显-2价,设钨元素的化合价是x,根据在化合物中正负化合价代数和为零,可得:(+2)+x+(-2)×4=0,则x=+6价.故选:A.