A: A【确定】
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为什么不是C?因为不管书价如何,运费总是要的。16+2.75试试?
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3、96。Q:有图,sth(考试时不认识,理解下来是半个圆柱体) is been cut half of a cylinda, the diameter of it 5, the volum of it is 35, ask you what is its high
No. 1: As long as M is not 0, there must be a intersection. Therefore, a) sufficient, b) not sufficient cause no info about M
No.2 I believe it is C. Because $18.75=$9 +$9.75 or $18.75=$2+$16.75.
fee is different. If b) is added, because if both > 4 then both must <15.
No.3 Need to assum it is cut vertically
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