【简答题】常用螺纹联接中 , 自锁性最好的螺纹是 。 A 、三角螺纹 B、梯形螺纹 C、锯齿形螺纹 D、矩形螺纹
【多选题】根据牙型螺纹可分为普通螺纹、管螺纹、梯形螺纹、矩形螺纹和锯齿形螺纹等,其中用于传动的有哪些?
【简答题】Please write down your answers to the Home Reading Part in the following box.
【简答题】螺纹联接中最常用的螺纹牙型是 ________ 。 A .三角螺纹 B.矩形螺纹 C .梯形螺纹 D.锯齿形螺纹
【简答题】Write down your answers to the exercise No. 1 in Home Listening (page 15). (以下各题要求相同) No.1 ________
【简答题】Write a summary on how to manage your finances When you're away from home, your parents expect you to be responsible for yourself and this includes taking care of your own finances. To manage your mon...
【简答题】Write down your answers to the exercise No. 2 in Home Listening (page 15). (以下各题要求相同) No.1 ________