下列运算正确的是( ) A.a2•(a3)2=a7 B.a6÷a2=a3 C.(a-2 发布时间:2017-04-22 14:49 │ 来源:www.tikuol.com 题型:选择题 问题: 下列运算正确的是( )A.a2•(a3)2=a7B.a6÷a2=a3C.(a-2)2=a2-4D.(12)-1+|-1|-(π-1)0=2
题型:选择题 — May we go home mow ? — No, you____. You____ to go home until5 o’clock.A.mustn’t; are allowedB.don’t have to; are supposedC.needn’t; aren’t allowedD.can’t; aren't supposed 查看答案
题型:选择题 Recently I realized the fact that I can now organize my own time, which ______.A.makes a good senseB.makes a great contributionC.makes a deep impression D.makes a big difference 查看答案
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