【简答题】7只老虎一天能吃35千克肉,照这样计算,9只老虎一天能吃( )千克肉?
【单选题】听力原文:W: I'm out of coins for the slot machine. Do you have any? M: I don' t have any either. But I'll get some from the cafe. Q: What does the man offer to do? (14)
A.
Get some coins at the cafe.
B.
Buy her a cup of coffee at the cafe.
C.
Get some coffee from the machine.
D.
Try to fix the machine.
【单选题】将干冰投入装水的玻璃杯中时,发现水在剧烈“沸腾”,杯口出现大量“白气”,此“白气”是
C.
干冰熔化吸热使空气中的水蒸气液化形成的小水滴
D.
干冰升华吸热使空气中的水蒸气液化形成的小水滴