问题 多项选择题

关子绒毛膜促性腺激素(HCG)的说法正确的是

A.是由合体滋养细胞产生的

B.于受精后10天左右,用放射免疫测定法可自母体血清中测出

C.是进行早孕诊断最敏感的方法之一

D.具有维持妊娠、营养黄体的作用

E.能使子宫内膜蜕膜化,维持孕卵生长发育

答案

参考答案:A,B,C,D,E

阅读理解

In 1826, a Frenchman named Niepce needed pictures for his business .But he was not a good artist .So he invented a very simple camera (照相机).He put it in a window of his house and took a picture of his garden .That was the first photo.

  The next important date in the history of photography (摄影术) was in 1837.That year, Daguere, another Frenchman, took a picture of his reading room .He used a new kind of camera in a different way. In his picture you could see everything very clearly, even the smallest thing. This kind of photo was called a Daguerreotype.

  Soon, other people began to use Daguerre's way .Travelers brought back wonderful photos from all around the world .People took picture of famous buildings, cities and mountains.

  In about 1840, photography was developed .Then photographers could take picture of people and moving things .That was not simple .The photographers had to carry a lot of film(胶片) and other machines. But this did not stop them, for example, some in the United States worked so hard.

  Mathew Brady was a famous American photographer. He took many picture of great people .The pictures were unusual because they were very lifelike(栩栩如生的)

  Photography has also became one kind of art by the end of the 19th century .Some photos were nor just copies of the real world .They showed feelings, like other kinds of art.

小题1:The first photo taken by Niepce was a picture of ____________

A.his business

B.his house

C.his garden

D.his window小题2:The Daguerreotype was____________.

A.a Frenchman

B.a kind of photo

C.a kind of camera

D.a photographer小题3:If a photographer wanted to take pictures of moving things in the year of 1840, he had to__________.

A.watch lots of films

B.buy an expensive camera

C.stop in most cities

D.take many films and something else with him.小题4:Mathew Brady______________.

A.was very lifelike

B.was famous for his unusual pictures

C.was quite strong

D.took many pictures of moving people

单项选择题