比45千克多20%是______；30吨比______吨少45吨；40米比60米_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

比45千克多20%是______；30吨比______吨少

4

5

吨；40米比60米少______%．

答案

（1）45×（1+20%），

=45×120%，

=54（千克）；

（2）30+

4

5

=30

4

5

（吨）；

（3）（60-40）÷60，

=20÷60，

≈33.3%．

故答案为：54千克，30

4

5

，33.3．

完形填空

Mr Clarke works in a middle school. He likes reading and often __小题1:__ some books from the library. He __小题2:__ to the radio every morning and reading __小题3:__ after supper. So he knows much and teaches well.His __小题4:__ worship(崇拜) him very much. Mike, Mr Clarke’s little son, is only nine. He __小题5:___ likes reading books. And he often asks his father some questions. Mr Clarke always thinks he's too __小题6:__ to understand him and chooses __小题7:__ ones to answer. Of course the boy is not satisfied with(对…满意) it. One day Mike read __小题8:__ about the electric lights (电灯) and was __小题9:__it. When his father told him to do some housework, he went on thinking of it. He asked him __小题10:__ questions, and his father answered all. Then his father said proudly, "Fathers always know __小题11:__than sons!" The boy thought for a while and said, __小题12:__" "Oh? Why?" Mike didn’t answer and asked, __小题13:__, "Who invented the electric lights?" __小题14:__ "answered Mr Clarke. "Why didn't his father invent them, then?" Looking at his son, Mr Clarke didn't know __小题15:___ to answer!

A．more difficult

B．the most difficult

D．the easiest

A．worried about

B．interested in

B．I don’t know

D．I don’t think so

A．Thomas Brown

B．Allan Smith

C．Thomas Edison

D．Ron Jenkins

多项选择题

MRI扫描程序直接控制的内容有（）

A.扫描序列脉冲的控制

B.MRI信号的采集

C.MRI重建

D.显示及后处理

E.静磁场强度