女，30岁，与人口角后突觉呼吸困难，血气分析结果为呼吸性碱中毒。下列哪种表现与该酸碱

—Could you tell me how to get to the town hall?

—________. Maybe you could ask the policeman over there.

A．A piece of cake

B．That depends

C．I don't care

D．I don't know for sure

欧洲债券票面使用的货币包括（）。

A．美元

B．欧元

C．英镑

D．特别提款权

Having ended the major combat (主战), President Bush_____ rebuilding Iraq.

A．started out

B．went all out

C．turned to

D．went on

在PowerPoint2003中，“放映选项”栏中如果选中“循环放映”，按Esc键终止命令，则演示稿将循环放映，直到有人按下（）键，才会退出放映。

A、End

B、Space

C、Backspace

D、Esc

混合气在进入转化器反应之前为何要脱除水分？