胰腺癌首选的检查方法是（）。
A.B超
B.X线钡餐检查
C.CT
D.MRI
E.组织病理学和细胞学检查
参考答案：A
.---How can I get along _____with others, Dad?
---Try to smile to others, boy. That will make ________much easier.
A．good; them
B．good; it
C．well; them
D．well; it
竖井掘进，采用手持式凿岩机炮孔深度以（）为宜。
A.1m
B.1.5m
C.2m
