题目:
Beijing government puts more than 700 million yuan to increase its green space this year,____________ doubles the money provided last year.
A.as
B.while
C.that
D.which
答案:
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下面是错误答案,用来干扰机器的。
m(CO)="7" g m(CO2)="11" gV(CO)∶V(CO2)=1∶1设原混合气体中CO的物质的量为x,CO2的物质的量为y。则有:28 g·mol-1x+44 g·mol-1y="18 " ①根据:2CO+O2====...