题目

_____ in her best skirt, the girl tried to make herself ____ at the party. A. Dressed; noticed   B. Dressing; noticing C. Dressing; noticed   D. Dressed; noticing 答案:A已知三点A(1,-1),B(a,3),C(4,5)在同一直线上,则实数a的值是A.1B.4C.3D.不确定
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