若两圆外切，其中一圆的半径为10，另一个圆的半径为7，则两圆的圆心距是____________．
17
两圆外切，
That's too loud! Don't you have ears? [ ]
A. Yes, I don't have ears.
B. No, I don't have ears.
C. No, I have ears.
D. Yes, I have ears.
申请证券评级业务许可的资信评级机构，应当具有中国法人资格，实收资本与净资产均不少于人民币( )万元。
A．500
B．1000
C．2000
D．3000
