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问题
判断题
有机玻璃是一种常用的高分子材料。
答案
参考答案：
对
选择题
—It is _______ to work out this problem. You needn't go to the teacher. I can help you.
—Thanks, It's very kind of you.
A. enough easy
B. easily enough
C. easy enough
D. very easily
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单项选择题
下腹部、会阴部手术在术后( )左右拆线
A．4～5天
B．7天
C．9天
D．12天
E．14天
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