The shop ___________ near the park.[ ]
A. is
B. are
C. do
D. does
答案:A
为保证能锁紧模具的侧滑块,斜导柱的斜角a与楔紧块的斜角a1关系为。()
A、相等
B、a>a1
C、aD、无关系
冷轧的定义及特点是什么?