选择题：He tried to stand on his hands for five minutes, _

题目分类：内蒙古农业大学-大学英语4
题目类型：选择题
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题目内容：

He tried to stand on his hands for five minutes, _______ is rather a difficult thing to do.(本题3.0分)
A、 that
B、 which
C、 whose
D、 /

参考答案：

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１１．简述疏忽大意过失的特征。

１１．简述疏忽大意过失的特征。

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S7-200系列PLC计数器的地址编号范围为。

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视在功率的单位是

分类：内蒙古农业大学-大学英语4 题型：选择题