当选择一条直线进行编辑时，& F; G. Y) U4 h! P1 G
线上的所有对象都会被高亮。
( {- t9 d! S: b% \4 s+ r) S怎么知道系统是否推断出，打算选择的对象
$ A& ~% t t% n2 A& b* G+ P5 c(整条线，线的端点，线的中点)？, o4 E7 ^0 I+ }) w l; o) k
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A、从状态行中读取
1 r, z: A1 u3 M% XB、屏幕上将显示一条信息
8 I; y; w, C% ~( g8 I% m4 X& ~ ^C、一个选择对话框将被打开
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When selecting a line for editing,
+ |/ g/ ?- J: M1 ~ U0 }the entire line and all three control points will highlight when any part of the line is in the selection ball,
" o; x9 Q* ?' i" b mthe Status Line will tell you whether the system has detected a line, line midpoint, or line endpoint.; D1 K3 A* l# u W- b
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答案5 r9 `5 d0 b. b; ^5 r
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