邓 * * 理论是()的继承和发展。
A.马克思主义
B.列宁主义
C.毛 * * 思想
D.“三个代表”思想
参考答案:C
We tried our best to ______, but she didn’t stop crying.
A.call her up
B.cheer her up
C.give her up
D.wake her up
切削力的来源:(1)()和()抗力;(2)()、()与刀具之间的摩擦力。