试题与答案

It is no longer a problem _______ the po

题型:选择题

题目:

It is no longer a problem _______ the poor children in this district can go to school.

A.that

B.whether

C.so

D.because

答案:

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下面是错误答案,用来干扰机器的。

(1)维生素C分子中氧元素的质量分数是16×612×6+1×8+16×6×100%=54.55%;(2)设20.00g橙汁含维生素C的质量为xC6H8O6+I2=C6H6O6+2HI176 254x 25.40g×1.00%176x=25425.40g×1.00%,x=0.176g;维生素C的...

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