关于Th细胞正确的是（）

A:需要同B细胞相互作用才能活化 B:Th细胞是均一的细胞亚群 C:需要识别抗原呈递细胞上同MHC－Ⅱ类分子结合的抗原 D:参与TI－Ag的应答 E:只辅助Tc细胞的免疫应答

A Letter from Alan

    I have learnt of a plan to build three hundred houses on the land called Parson"s Place by the football ground. Few people know about this new plan to increase the size of our town. For me, Parson"s Place is special because it is a beautiful natural area where local people can relax — the small wood has many unusual trees and the stream is popular with fishermen and bird-watchers. ¹ It"s very quiet because there are few houses or roads nearby. I think that losing this area will be terrible because we have no other similar facilities in the neighbourhood.

    I am also against this plan because it will cause traffic problems. How will the people from the new houses travel to work? The motorway and the railway station are on the other side of town. Therefore, these people will have to drive through the town centre every time they go anywhere. The roads will always be full of traffic, there will be nowhere to park and the tourists who come to see our lovely old buildings will leave. ²  Shops and hotels will lose business. If the town really needs more homes, the empty ground beside the railway station is a more suitable place.

    No doubt the builders will make a lot of money by selling these houses. But, in my opinion, the average person will quickly be made poorer by this plan. As well as this, we will lose a very special place and our town will be much less pleasant. ³

    I am going to the local government offices on Monday morning to protest about this plan and I hope that your readers will join me there. We must make them stop this plan before it is too late.

词汇：

facility /fə"siləti/n．场所，设施

motorway /"məutəwei/ n．高速公路

protest /prəu"test/v．抗议

注释：

1.For me, Parson"s Place is special because it is a beautiful natural area where local people can relax一the small wood has many unusual trees and the stream is popular with fishermen and bird-watchers．对我来说，帕森场是非常特别的，因为它是一个美丽的天然场地并且当地人可以在此放松休息。这片小树林里有许多独特的树木并且这里的小溪受到了渔夫和野鸟观察者的欢迎。

2.The roads will always be full of traffic, there will be nowhere to park and the tourists who come to see our lovely old buildings will leave．公路上将总是有很多车辆，却没有地方停车，并且来参观我们这儿可爱的老式建筑物的观光者将会离开这里。

3. As well as this, we will lose a very special place and our town will be much less pleasant．不但如此，我们将失去一个非常特别的地方并且我们的城镇将会失去很多快乐。

Why is Parson"s Place particularly important, in Alan"s opinion?

A:Because it is near the football ground. B:Because lots of people live near it. C:Because it is a place near the town where people can enjoy nature. D:Because local people can get there easily by car from the town.

理想气体在高温热源温度TH和低温热源温度TL之间的卡诺循环的热效率为（）

A:（TH-TL）/TH B:TH/（TH-TL） C:TL/（TH-TL） D:（TL-TH）/TH

理想气体在高温热源温度TH和低温热源温度TL之间的逆向卡诺循环的制冷系数为（）

A:（TH+TL）/TH B:TH/（TH-TL） C:TL/（TH-TL） D:（TL-TH）/TH

The place where the goods are produced is______

A:place of origin B:place of order C:place of interest D:place of issue

Ranch. It was near Los Angeles in California. A few years later Hollywood was one of the famous places in the world. At the beginning of the 20th century there was a big farm called Hollywood. From the 1910’s to the 1950’s, Hollywood was the film center of the world.
Every family knew the names of its film stars——Charlie Chaplin, Greta Garbo, Bergman and hundreds more.
The reason why people went to Hollywood to make films was the sun. At first, people made films in New York on the east coast of the United States.
But then they heard about Los Angeles, where there are 350 days of the sun every year. As they made all the films by sunlight, the west coast was a much better place to work. Also near Hollywood you can find mountains and sea and desert. They did not have to travel far to make any kind of film.
When TV became popular, Hollywood started making films for television. Then in the1970’s they discovered people still went to the cinema to see big expensive films. Nowadays they are still making films in Hollywood and people see them all over the world.
People went to Hollywood to make films because ______.

A:it was a beautiful place B:they could find many film stars C:there was a lot of sunlight there D:it was a famous place

Ranch. It was near Los Angeles in California. A few years later Hollywood was one of the famous places in the world. At the beginning of the 20th century there was a big farm called Hollywood. From the 1910’s to the 1950’s, Hollywood was the film center of the world.
Every family knew the names of its film stars——Charlie Chaplin, Greta Garbo, Bergman and hundreds more.
The reason why people went to Hollywood to make films was the sun. At first, people made films in New York on the east coast of the United States.
But then they heard about Los Angeles, where there are 350 days of the sun every year. As they made all the films by sunlight, the west coast was a much better place to work. Also near Hollywood you can find mountains and sea and desert. They did not have to travel far to make any kind of film.
When TV became popular, Hollywood started making films for television. Then in the1970’s they discovered people still went to the cinema to see big expensive films. Nowadays they are still making films in Hollywood and people see them all over the world.
People went to Hollywood to make films because ______.

A:it was a beautiful place B:they could find many film stars C:there was a lot of sunlight there D:it was a famous place