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最佳答案:特殊疑问词(wh-词)+be动词情态动词助动词do或does+主语+谓语动词+其他?例如、1.Who (wh-词)is(be动词 ) this boy(主语)?
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最佳答案:疑问句:Are you a student?肯定回答:Yes,i am .否定回答:No,i am not.肯定句:I want to fly.否定句:I do
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最佳答案:1.You must do the homework.----- Must I do the homework?----Yes,you must.No,you
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最佳答案:X2 +4x+X/3-x+2/3=13 X2 +12x+X-3x+2=33 X2 +10x+2=33 X2 +10x-1=0A=3 b=10 c=-1Δ=102
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最佳答案:x^2+4x+x/3-x+2/3=1x^2+(4+1/3-1)*x=1-2/3x^2+10x/3-1/3=03x^2+10x-1=0x1=3分之(-5+2根号7