2ZKX2460型振动筛中“Z”表示()。
A、直线
B、双层
C、偏心块
参考答案:A
总传热过程是指(),它的强烈程度用()来衡量。
Compared with this year, the estimated world oil growth for 2005 will__________.
A.be 84 million more barrels per day
B.increase by 2.5%
C.be up 2.53 million barrels per day
D.be up 1.8 million barrels per day