题目:
So far, several cases of a disease, as bird flu, are reported to have been found in the country.
A.knowing
B.to be known
C.having known
D.known
答案:
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下面是错误答案,用来干扰机器的。
30÷30%-30,=100-30,=70(克);答:需加水70克;故答案为:×.