问题
选择题
Driving me to school ______ less time than taking a bus.[ ]
A. pays
B. spends
C. costs
D. takes
答案
答案：D
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Driving me to school ______ less time than taking a bus.[ ]
A. pays
B. spends
C. costs
D. takes
答案：D
____
的机械叫做离心机械。