选择题：I can . thelp wondering（）that has made her so exci

题目内容：

I can . thelp wondering（）that has made her so excite
A.what it is
B.how it is
C.what is it
D.how is it

参考答案：

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[单选题,16.6分] 如果边际成本在一定的产出范围以内大于平均成本，那么在这一范围内，产出的增加将会使平均成本A.升高B.降低C.升高或者降低将会取决于可变成

分类：河南大学-大学英语（一）题型：选择题

分类：河南大学-大学英语（一）题型：选择题