患者，男性，因头晕、乏力、柏油样黑便入院诊治，既往有泛酸及上腹痛史。体格检查：腹软、

Jenny：Look! Three people are over there. One is in the red car.

and the other two are behind the car. Who is that man?

Tim：Which man?

Jenny：The man in the red car.

Tim：Oh, that is my father.

Jenny：Who’s the other man?

Tim：He is my uncle.

Jenny：Is that woman your mother?

Tim：No, the woman behind the car is not my mother.

She is my English teacher. My mother is at home.

小题1:How many people are there in the car?

A．One.

B．Five.

C．Three.

D．Six.小题2:Who is in the car?

A．Tim’s teacher.

B．Jenny’s father.

C．Tim’s uncle.

D．Tim’s father.小题3:Where is Tim’s uncle?

A．In the car.

B．At home.

C．Behind the car.

D．At school.小题4:How many people are  with Tim’s father?

A．Four.

B．Two

C．One

D．Three.小题5:The woman behind the car is ________________.

A．Tim’s mother

B．Tim’s teacher

C．Jenny’s teacher

D．their teacher

By the time he realizes he ________into a trap, it'll be too    late for him to do anything about it.                [ ]

A. walks                        

B. walked  

C. has walked                    

D. had walked

数学学习中由数字运算到字母运算的转化，属于( )。

A．自上而下的迁移

B．自下而上的迁移

C．正迁移

D．负迁移

E．水平迁移

心包积液与右心功能不全的区别是：（）

A.颈静脉怒张

B.肝肿大

C.水肿

D.肝颈静脉回流征阳性

E.心音低而遥远

现有两个常规投资方案，当i=10%时，两个方案的净现值相等，i_c为12.8%，其他条件如下表，则( )。

A．由于方案甲的内部收益率大于方案乙的内部收益率，保留方案甲

B．由于方案乙的净现值大于方案甲的净现值，保留方案乙

C．由于增量内部收益率小于基准收益率，保留方案甲

D．由于计算期不同，无法确定优选方案