刀工处理时需要顶丝切的肉是（）。
A.鸡肉
B.猪肉
C.牛肉
D.羊肉
参考答案：C
David's friend don't want to _______any money to him, because he never returns anything
he ______ from them.[ ]
A. lend, lends
B. lend, borrows
C. borrow, lends
D. borrow, borrows
缝翼扭矩限制器安装在（）
A.扭力轴上
B.作动筒上
C.PCU输出轴上
D.PCU马达上
