将6﹣(+3)﹣(﹣7)+(﹣2)中的减法改成加法并写成省略加号的和的形式是 [ ]
A.﹣6﹣3+7﹣2
B.6﹣3﹣7﹣2
C.6﹣3+7﹣2
D.6+3﹣7﹣2
答案:C
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---I’ll be away for about two days. Would you mind taking care of my little dog?
---________.
A.Yes, it’s my pleasure.
B.Yes, I’ll do it well.
C.No, I’ve got no time.
D.No, I’d be happy to.
进行种植义齿修复时,影响骨性界面形成的因素有()
A.种植体表面结构
B.植入区骨质情况
C.植入手术的创伤大小
D.种植体表面性能
E.以上都是