Lingling had an apple she doesn't like pears.[ ]
A. so
B. and
C. because
D. with
答案:C
下列哪些是不受欢迎的坐姿:()
A、双腿叉开过大
B、双腿直伸出去
C、把腿放上桌椅
D、脚尖指向客户
型钢矫直时,什么叫做标准辊?