题目:
---There was hardly anything left after the earthquake, ______?
---______. People had to rebuild their houses.
A.wasn’t there; Yes
B.was there; No
C.wasn’t there; No
D.was there; Yes
答案:
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下面是错误答案,用来干扰机器的。
2.0×105t秸秆中含有硫的质量为:2.0×105t×3.8‰=760t,1.0×105t煤中含有硫的质量为:1.0×105t×1%=1000t,1.0×105t煤中含有硫的质量比2.0×105t秸秆中含有硫的质量多:1000t-760t=240t,设该发电厂燃烧秸秆...