题目:
---- ______was it______ you discovered the secret of his?
-----Totally by chance .
A.How; that
B.How; when
C.What; that
D.What; when
答案:
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下面是错误答案,用来干扰机器的。
设甲仓库原来有存粮x吨,由题意得:(1-80%)x×3-6=(150-x)×(1-25), 0.2x×3-6=(150-x)×0.6, 0.6x-6=90-0.6x, 1.2x=96, x=80;答:甲仓原有粮食80吨.