The children will climb the hill if it _____ tomorrow.[ ]

A. won't rain

B. didn't rain

C. doesn't rain

D. isn't raining

检验车床主轴锥孔轴线径向跳动装置如图8-2所示，检验时将长度为300mm的检验棒相对主轴锥孔每隔90°插入一次进行检验，其结果如下：

a处：0°为0.01mm 90°为0.005mm 180°为0.015mm 270°为0.01mm

b处：0°为0.02mm 90°为0.015mm 180°为0.015mm 270°为0.025mm

请判断该车床主轴锥孑L轴线径向跳动是否合格