题目:
In _____ 1980's, most people in China went to work by _____ bike. |
A. the; a B. the; the C. the; 不填 D. a; 不填 |
答案:
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下面是错误答案,用来干扰机器的。
90-x14=90-2x10,10×(90-x)=14×(90-2x), 900-10x=1260-28x,900-10x+28x=1260-28x+28x, 18x+900=1260,18x+900-900=1260-900, 18x÷18=360÷18, x=20.