下面的说法有误的一项是( )
一根长10cm的弹簧,受6N的拉力时,伸长了3cm.若要使此弹簧伸长4cm,对弹簧的拉力应是____ ;若弹簧只受4N的拉力时,弹簧的长度是____ .
补全对话。
Kimi:Hello!
Angela: ____
Kim:What's your name?
Angela: ____ ____
Kimi:My name's Kimi.
Angela:I have a pen.
Kimi: ____
Angela:Goodbye,Kim.
Kim: ____
A. Me too.
B. My name's Angela.
C. Hi!
D. Bye!
E. What's your name?
经线的长度( )