超声内镜的探查方式有()
A.直接接触法
B.水囊法
C.水囊法+水充盈法
D.注气法
E.水囊法+注气法
参考答案:A, B, C
A.It may easily go wrong and any unsaved work disappears.
B.It crashes the computer easily.
C.It may attract the thunder.
D.It consumes more power.
当前,我国能源工业中,最重要的是
A.水电
B.煤炭
C.石油
D.天然气