题目

解方程:. 答案:解:y−2y−3=2−13−y,两边同时乘以最简公分母(y−3),得y−2=2(y−3)+1,解得y=3.经检验,y=3是原方程的增根.故原方程无解.—We’ll eat as soon as the meat is done. —It has__________to cook for another five minutes. A.still       B.yet       C.already      D.may
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