根据句意和所给的汉语写出单词，每空一词。

小题1:We are all looking forward to __________（讨论）our travel plan.

小题2:Sit __________(笔直) please, boys and girls.

小题3:The girl with long hair is the__________(胖的)of the three.

小题4:How many _____________(语言) did you learn in the past? Three. But I was good at none of them.

小题5:This is one of the best___________（杂志）in our town.

胸外心脏按压的理论基础是（）

A．肺泵机制 

B．心泵机制 

C．胸泵机制 

D．主动脉机制 

E．肺动脉机制