混凝土搅拌机按其工作原理,可以分为自落式和强制式两大类,其中自落式混凝土搅拌机适用于搅拌( )混凝土。
A.轻骨料 B.干硬性C.塑性 D.超干硬性
参考答案:C
A: Hi,Tom !
B: Hi, Alice !
A: 小题1:
B: No, not much. But I travel quite a lot in Beijing.
A: 小题2:
B:The Temple of Heaven , the Great Wall , Tian’anmen Square, Yuanmingyuan Park and so on.
A:What do you think of Beijing’s traffic?
B: 小题3: But I also like the buses especially for short journeys.
A: But don’t you think the buses are rather slow ?
B:Yes, I do . But it’s very cheap.
A: 小题4:
B: Taxi often gets us in traffic jams , and besides, they ’re too expensive.
A: 小题5: .
B:I think taking the subway is the best way to travel.
如图所示,灯泡L上标有“12V”字样,测得灯泡的电阻为10Ω,开关S闭合,电流表的示数为0.6A,灯泡正常发光.请你根据这些条件,通过分析和计算,至少求出3个未知的物理量.