电缆线芯有时压制圆形、半圆形、扇形等形状，这是为了缩小电缆外形尺寸，节约原材料。
参考答案：对
is good for our health. It's my favourite sport. [ ]
A. Swim
B. Swiming
C. Swimming
D. Swims
奇经八脉与十二经脉之气相交会的八个腧穴称为
A．原穴B．郄穴C．八会穴D．下合穴E．八脉交会穴
