1、题目17ID799下列各句中,没有语病的一句是

1、题目3ID2706He promised () his old friend during his stay in Tianjin.

1、题目2ID3200Would you like to go to the concert with me? -----I＇d love to,()I＇m afraid I have no time.

1、题目1ID2735I think it＇s really () hard work for me to finish the job in twenty minutes.

1、题目80ID4280若集合A={a,b},B是A的真子集,则集合B中元素的个数是( )

1、题目79ID4271设集合A={x|2≤x<4},B={x|3x-7≥8-2x},则A∪B等于( )

1、题目78ID4194设集合M={x|-4<x<3},N={x|x≤2},则M∪N=( )

1、题目77ID42932,x,8,16,y成等比数列,则y-x=( )

1、题目76ID4254在等比数列{an}中,已知a3·a5=5,则a1·a2·a6·a7=( )

1、题目75ID425016,8,x,y成等比数列,则x-y=( )

1、题目74ID4232y=sin3x的周期为( )