大隐静脉曲张手术后，如无异常下地行走时间是术后A．3h～5h B．6h～9h C．1

正常覆盖时，上颌切牙切缘到下颌切牙唇面的水平距离是

A．10mm以上

B．8～9mm

C．6～7mm

D．4～5mm

E．小于3mm

Here is the bulletin board of Class 3. Some of the students put their notes on it. Please read them and answer the following questions.

小题1:The Chinese meaning of "bulletin board" is _______.

A．电影广告

B．寻人启事

C．公告栏

D．通缉令小题2:According to the notes on the bulletin board, what holiday might be coming?

A．Christmas

B．Halloween

C．Thanksgiving

D．New Year's Day小题3:When Julia is busy, what does Alex always help her do?

A．To do math homework.

B．To clean the windows.

C．To have P. E. class together.

D．To take books to school.小题4:From the bulletin board, we know that Mr Chen is a ___________.

A．repeater

B．P.E. teacher

C．doctor

D．pilot小题5:Why does Bill lend books to Mario?

A．They are classmates.

B．Miss Li wants him to do so.

C．Bill has too many books.

D．Mario forgot to bring his books to school.

绿洲是荒漠中的明珠。读图回答问题。

小题1:下列山地中，乙图所示地形发育较好的是：

A．长白山麓

B．武夷山麓

C．祁连山麓

D．横断山麓小题2:甲图所示地区的农业生产类型主要是：

A．种植业

B．畜牧业

C．混合农业

D．林业

对于报关员离职时未交还报关员证件的，其所属单位应当在报刊上声明作废，并向海关办理注销手续。( )

什么是中医专家系统？