Children in the USA like K Day very much..K is for kite. March 7 is the day.On that day, lots of children go out in the open air. They take their kites with them. Some kites are very big. Others are small. They are in different colours. Every kite has a long string(绳). To get the kites up, the children begin to run. They let out the string from the ball in their hands. Now the kites are flying in the air. How nice they look!

　 Now all of the kites are high up in the air. Some are higher than(比) others. The one like a bird is the highest(最高). But what’s wrong? It’s flying away! The string is broken.

　 Another kite gets away. And more kites fly. But the children are running after them. They want to get them back. People are watching them and laughing.

(　 )6.K is for_________

　　 A.kind B.kilometer　 C.kites　 D.knife

(　 )7.K Day is on _______.

　　 A.May 7 B.March 7 C.April 7　 D.April 1

(　 )8.To get his kite up, a child must ______

A.run and run　 B. walk and let out the string from the ball in his hand

B.walk and walk　 D.run and let out the string from the ballin his hand

(　 )9.The kite like a bird is _______ of all.

　　 A.high　 B.higher　　 C.the highest D.tall

(　 )10.The string of the kite like a bird is______

　　 A.long　 B.short　　 C.broken　　 D.very good

　

如图甲表示某生物膜结构，图中A、B、C、D、E、F表示某些物质，a、b、c、d表示物质跨膜运输方式。图乙和图丙表示物质运输曲线，请据图回答：


（1）若图甲是癌细胞的细胞膜，则膜上含量较正常细胞减少的物质是[　　]　　　　。
（2）若图甲是线粒体膜，b和c过程运输的气体分别是　　　　。b、c运输方式符合图　　　　所表示的物质运输曲线。
（3）若图甲表示人体红细胞膜，则表示Na^＋、K^＋运输的分别是图中　　　　　　。Na^＋、K^＋的运输方式符合图　　　　所示曲线。
（4）已知红细胞吸收葡萄糖是协助扩散，而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖，请设计实验加以确定。
①实验步骤：
第一步：取甲、乙两组生理状况相同的小肠上皮细胞，放入适宜浓度的含有葡萄糖的培养液中。
第二步：甲组细胞给予正常的呼吸条件，　　　　　　　　　。
第三步：　　　　　　　　　　　　　　　　。
②预测实验结果并分析：
a．若甲、乙两组细胞对葡萄糖的吸收速率基本相同，则　　　　　　　　　。
b．                                。

We can not live a modern life without traveling．The fastest way of traveling is by air．With a plane people can travel in one day to places which it took a month or more to get to a hundred years ago．

Traveling by train is slower than by plane, but people can see the country when they are traveling through．Modern trains have comfortable seats and dinning-cars．They make even the longest journey（旅途） enjoyable．

Some people prefer to travel by sea when possible．There are large luxury liners（客轮） or river boats．They are not as fast as trains or planes, but traveling by sea is a very pleasant way to spend a holiday．

Many people like to travel by car．They can make their own timetable．They can travel hundreds of miles or only fifty miles a day, just as their wish．They can stop wherever they want to see something interesting or to enjoy a good meal at a good restaurant, or to spend the night at a hotel．That is why people choose traveling by car for pleasant trips, while they usually take trains or planes for business．

1.According to（根据） the passage, the fastest way of traveling is ______________

A．by car

B．by train

C．by plane

D．by sea

2.People can make even the longest journey enjoyable if they take the _________

A．train

B．plane

C．sea

D．bus

3.______ is a very pleasant way to spend a holiday．

A．Traveling by bike．	B．Traveling by train．
C．Traveling by sea．	D．Traveling by car．[来源:Z+xx+k.Com]

4.If we travel by car, we can _________

A．enjoy the longest journey

B．travel only fifty miles a day[来源:Z|xx|k.Com]

C．make our own timetable

D．travel to a very far place in a few minutes

5.When people travel on business, they usually take

A．a boat or a train	B．a car or a boat
C．a plane or a car	D．a train or a plane