A car travels at a rate of 50 miles per hour.How long will it take to travel 300 miles()
A. 250hours
B. 6hours
C. 1/6hours
D. 15000hours
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He gave us a good ____ of his experience.
A. demonstration
B. frequency
C. descripton
D. instruction
Paris is the capital of __________
A. the USA
B. the UK
C. France
D. Australia
部门级服务器一般支持()个CPU
A. 1
B. 2
C. 4
D. 8
This mountain range has many high _____ and fertile valleys.
A. peaks
B. hills
C. phase
D. pink