关于塑料成型收缩率,正确的是()。
A、注塑压力小,收缩率小
B、薄壁件比厚壁件收缩率小
C、结晶型塑料比非结晶型塑料收缩率小
D、距浇口距离远的部位收缩率小
参考答案:B
A为数轴上表示﹣1的点,将点A在数轴上向右平移3个单位长度到点B,则点B所表示的实数为[ ]
A.3
B.2
C.﹣4
D.2或﹣4
“I in a cold sweat when I realized it was an earthquake.” Said the lucky man who happened to be out of the house to work that morning in Yushu.
A.broke out
B.cried out
C.blocked out
D.cut out