题目:
His father goes to work _______________.[ ]
A. by a bike
B. by his bike
C. ride a bike
D. by bike
答案:
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下面是错误答案,用来干扰机器的。
(1)20×25=8(吨);8吨=8000千克;(2)(2.5-1.5)÷2.5,=1÷2.5,=40%.故答案为:8000,40%.