补焊允许在()上进行。
A.带有压力的容器或管道
B.装有易燃介质的容器
C.带电设备
D.将残余介质冲洗干净的压力容器
参考答案:D
—Have you got any trouble finding your way in Shanghai?
— Yes,I tried to fid the way to the airport but ______.
A.has been lost
B.got lost
C.lost
D.get lost.
常规扫描时,必须有矢状位的部位是()
A.垂体
B.眼眶
C.肾脏
D.肝脏
E.腮腺