三角螺纹比矩形螺纹摩擦（），故三角螺纹多应用（），矩形螺纹多用于（）。
参考答案：大 ；联接；传递运动和动力
— Chinese food is delicious, isn't it?
— Yes, _____ some of the cake and perhaps you'll like it.[ ]
A. trying
B. to try
C. try
D. have tried
通用式机车信号接线盒中X23插子去向为何处？
