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
The doctor did a lot to reduce the patient’s fear ____he would die of the disease.
A. that
B. which
C.of which
D. of that
磁感应强度计量单位换算公式为
A.1T=10 000mTB.1T=1 000GsC.1T=100GsD.1Gs=10mTE.1mT=10Gs