找出不同类的单词 ( )(1)A.late B. pleased C. class ( )(2)A. in B. about C. which ( )(3)A.fifteen B. seven C. milk ( )(4)A.do B. does C. be ( )(5)A. Mr. B. Mrs. C.mum
极坐标方程表示的曲线为()
若点在以点为焦点的抛物线上,则等于()
如图,A、B是⊙O上的两点,AC是⊙O的切线,∠B=70°,则∠BAC等于() A.70° B.20° C.35° D.10°
如图,D、E分别是AB、AC上两点,CD与BE相交于点O,下列条件中不能使ΔABE和ΔACD相似的是() A.∠B=∠C B.∠ADC=∠AEB C.BE=CD,AB=ACD.AD∶AC=AE∶AB
若动直线与函数和的图像分别交于两点,则的最大值为()