【简答题】(1)直线AD是( );(2)直线EB是( ) (3)直线FC是( );(4)直线AB是( )
【单选题】W : What’s Sanya famous for? M:Its beautiful beaches. What can people see in Sanya? ____________
【单选题】What is the best place to test the aroma of a particular perfume?
【单选题】What traditional performances can people see at the temple fair?
C.
performances representing palace events
【简答题】已知:⊙O中,OB、OC是半径,DF⊥OC于F,AE⊥OB于E,若AB=CD,求证:AE=DF.
【单选题】已知定义的DataFrame如下:【图片】df['city']的结果是?
A.
0 北京 1 上海 2 广州 3 北京 Name:city,dtype:object
【简答题】如图,△ABC内接于⊙O, AD是⊙O直径, E是CB延长线上一点, 且ÐBAE=ÐC. (1)求证:直线AE是⊙O的切线; (2)若EB='AB' , , AE=24,求EB的长及⊙O的半径。
【简答题】如图,△ABC内接于⊙O,AD是⊙O直径,E是CB延长线上一点,且∠BAE=∠C. (1)求证:直线AE是⊙O的切线; (2)若EB=AB, ,AE=24,求EB的长及⊙O的半径.