4．已知一算法的程序框图如右图：则输出的为(　　　 )

A．17　　　　　　 　　　　　　　 B．16

C．15　　　　　　 　　　　　　　 D．14

3.下列表述正确的是(　　 )

①归纳推理是由部分到整体的推理；②归纳推理是由个别到一般的推理；③演绎推理是由一般到特殊的推理；④类比推理是由特殊到一般的推理；⑤类比推理是由一般到特殊的推理。

　A．①②③； 　 B．②③④； 　 C．②④⑤；　　　　 D．①③⑤。

2.设有一个回归方程为y=2-2.5x,则变量x增加一个单位时(　　　 ).

A.y平均增加2.5个单位　　　　　　　 B.y平均增加2个单位

C.y平均减少2.5个单位　　　　　　　 D.y平均减少2个单位

1．若复数满足，则(　　 )．

A.　　　　　 B.　　　 C.　　　 D.

4． From the text we know the writer believes ______ .

A．sitting has a good spiritual effect

B．sitting helps people remember the past

C．a sitting room may have different purposes

3．The sitting room mentioned in the text used to be a place for ______ .

A．eating food　　　　 　　　　　　　　　　　　　　 B．watching TV

C．gathering together　　 　　　　　　　　　　　　　 D．playing with children

2．We can learn from the second paragraph that______ .

A．people lived a more restful life in the past

B．towns were built to make living convenient

C．small town garages had a lot to offer

D．people enjoyed going out for a drive

1．What message does the author try to get through to us?

A．People should make better use of their sitting room.

B．People should spend less time watching TV.

C．People should pass down their good habits.

D．People should take things easy for their own good.

9．In countries where there are still not many schools, education is a ______ .

A．power　　 B．privilege　　 C．program　　 D．promotion