题目

The most satisfying life is a life     you know the things you’re interested in and pursue （追求）it for your own.        A．which       B．where       C．that   D．what 答案：B如图，AO是△ABC的中线，⊙O与AB边相切于点D， (1)要使⊙O与AC边也相切，应增加条件________(任写一个)． (2)增加条件后，请你证明⊙O与AC相切．