Q: How many hours is the flight from Toronto to Beijing?
A. 18 hours
B. 28 hours
C. 20 hours
D. 19 hours
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Q: How much will it cost to buy one US dollar in Canadian money?
A. $1
B. $1.15
C. $1.25
D. $1.05
Q: What time does the person's flight leave?
A. 1:45 PM
B. 2:45 PM
C. 3:45 PM
D. 2:00 PM
Q: How much does the person owe on credit?
A. $3, 500
B. $4, 500
C. $4, 050
D. $4, 000
从动件底面与凸轮之间润滑良好,并常用于高速场合的从动件是()。
A. 滚子从动件
B. 平底从动件
C. 尖顶式从动件
D. 曲面从动件
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