题型:名词解释 已知等比数列{an}满足an>0(n∈N*),且a5a2n-5=22n(n≥3),则当n≥1时,log2a1+log2a3+log2a5+…+log2a2n-1等于( )A.(n+1)2B.n2C.n(2n-1)D.(n-1)2 查看答案
题型:名词解释 (2009安徽安庆模拟) He _____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.A.shouldB.mustC.wouldn’tD.can’t 查看答案