副偏角Kr’较小时,可减小切削时的()
A.残留面积
B.切削阻力
C.工件变形
D.刀具磨损
参考答案:D
We have strong ________ for believing that the newly-invented material is not only popular but also a monument to the eco-friendly lifestyle.
A.grounds
B.reasons
C.causes
D.purposes
明确提出“使人类教育心理化”的口号,对推动教育活动的科学化产生了巨大影响的教育家是( )。
A.裴斯泰洛齐 B.夸美纽斯 C.赫尔巴特 D.培根