在Word中切换插入和改写两种编辑方式的按键是()。
A.Shift
B.Insert
C.Home
D.Backspace
参考答案:B
The picture in an ad looks __ better than the real thing. [ ]
A. very
B.little
C.lots of
D.much
十二指肠球部溃疡的直接X线征象为()
A.球部变形
B.黏膜紊乱
C.球部局限性压迹
D.龛影
E.球部激惹征