胰腺癌影像诊断的首选方法是（）。
A.B超
B.CT检查
C.X线钡餐造影
D.核素扫描
E.选择性血管造影
参考答案：B
SOL2事务的隔离级别中的READ COMMITTED，等同于______。
A．X锁
B．S锁
C．无锁
D．COMMIT
Everyone had an application form in his hand, but no one knew which office ___.
A．to send it to
B．to send it
C．to be sent to
D．to have it sent
