如图,∠ACB=∠CDE=90°,B是CE的中点,∠DCE=30°,AC=CD.求证:AB∥DE.
— I don’t like this jacket. Could you please show me __________? — OK. Here you are. A. other B. another C. the other
如图,AB切⊙O于点A,BO交⊙O于点C,点D是异于点C、A的一点,若∠ABO=,则∠ADC的度数是 .
(08年银川一中二模) 曲线y=2x-x3在横坐标为-1的点处的切线为,则点P(3,2)到直线的距离为( )A. B. C.
阅读下面的文字,完成20―23题。我是柏林人柳杰他是个在波士顿出生的美国人。他出身富有的世家,天资极高,虽然进大学以前很少得到老师的欢心,
Had the boy worked harder, he ______ the exam. A.must have got through B.could get through C.ought to get through