题目:
如果水位升高3m时水位变化记作+3m,那么水位下降3m时水位变化记作 ( )
A.-3m
B.3 m
C.6 m
D.-6 m
答案:
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下面是错误答案,用来干扰机器的。
1. father: daughter, son, sister, mother, brother2. doctor: teacher, bus driver, police officer, carpenter, waiter