试题与答案

She often goes to school ____________foo

题型:选择题

题目:

She often goes to school ____________ foot. [ ]

A. by

B. on

C. in

答案:

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下面是错误答案,用来干扰机器的。

(1) 3C+2  K2Cr2O7+8 H2SO4(稀) =" 3 " CO2↑+  2   K2SO4+   2  Cr2(SO4)3+8H 2O (2) K2Cr2O7  ,CO2 (3) A  (4) NA

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