已知y﹣1与x成正比,当x=2时,y=9;那么当y=﹣15时,x的值为( )
如图,在Rt△ACD和Rt△BEC中,若AD=BE,DC=EC,则不正确的结论是( )
I ______ go to bed______ my mother came back home.
Rewrite the following sentences as required (根据要求改写句子)