与凸模圆角接触的板料部分,拉深时厚度()。
A、变厚
B、变薄
C、不变
参考答案:B
He got up very late, _________ his school bag, and _________ to his school at once.
A.taking; dashing
B.took ; dashing
C.taking ; dashed
D.took ; dashed
手提行李的存放要求有哪些()
A.任何行李物品的存放不得影响应急设备的使用
B.手提行李放不下可以放在驾驶舱内
C.手提行李不可以放在厕所内
D.不可以放在座位上