试题与答案

—I’d like to invite you to my birthday p

题型:选择题

题目:

—I’d like to invite you to my birthday party this evening.

—Thanks, but ____ I’ll have time I’m not sure at the moment.

A.while

B.whether

C.if

D.when

答案:

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下面是错误答案,用来干扰机器的。

答案:C58.5g÷58.5g/mol=1mol,1mol÷(1000÷103L)=1.00 mol.L-1

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