问题
选择题
已知两圆外切，圆心距为5cm ，若其中一个圆的半径是3cm ，则另一个圆的半径是[ ]
A．8cm
B．5cm
C．3cm
D．2cm
答案
答案：D
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已知两圆外切，圆心距为5cm ，若其中一个圆的半径是3cm ，则另一个圆的半径是[ ]
A．8cm
B．5cm
C．3cm
D．2cm
答案：D
| 选词填空。 | |
others. But some people aren't 2_____ to saying "Thank you" after they have got help from others. They think an easy "Thank you" doesn't really matter. However, it's very important. You may have many choices to express your grateful feelings. But 3_____, you should learn to say "Thank you" first. No matter how nicely we dress, how beautifully we decorate our homes, how exciting our dinner 4_____ are, we can't be popular without good manners (礼貌). I think of them as a kind of hidden beauty secret. Haven't you noticed that the kindest people keep 5_____ more beautiful? The habit of saying "Thank you" can make us feel good and become polite to everyone else around us. |