The author mentions all of the following ways to measure time EXCEPT ______.
A. sundial
B. electric clock
C. hourglass
D. mechanical clock
我国某钢铁公司从澳大利亚进口铁矿砂20000公吨,根据《跟单信用证统一惯例》规定,该公司收货时,最多可以收铁矿砂( )公吨。
A. 20000
B. 24000
C. 18000
D. 22000
The publication of _____ established Emerson as the most eloquent spokesman of the New England Transcenden- talism.
A. Nature
B. Self-Reliance
C. The Over-Soul
D. The American Scholar
甲、乙两地相距600千米,大车和小车都从甲地开往乙地,大车的速度是50千米/小时,大车早上9点出发,小车中午12点出发,中间都没有休息,结果小车比大车提前3小时到乙地,小车和大车的速度比是多少?()
A. 2:1
B. 3:1
C. 12:5
D. 5:12