资产阶级政党最早产生于().
A.美国
B.德国
C.英国
D.法国
参考答案:C
It’s ___ time that he has failed in the experiment.However, he has made up his mind to try ___ time next week.
A.the first…a second
B.a first.. the second
C.for the first.. second
D.the first..second
循环水冷却倍率是()的重量流量与()的重量流量之比,一般为50─60倍。