问题 问答题 简答题

精液的低温保存操作:1)稀释精液。2)把稀释后的精液分装到小试管或玻璃瓶中,盖好封严。包以数层脱脂棉或纱布,最外层装上防水套扎紧,放到冰箱的低温室(4℃)。如果没有冰箱,可在广口保温瓶内加7成满的冰块,把包装好的精液放到上面即可,盖好盖,定期添加冷源。

牛细管冻精的制作程序如何?

答案

参考答案:

牛细管冻精的制作程序为采精→精液处理→降温平衡→分装→冻结→解冻及活力观察。

阅读理解

We live in a dangerous world. The figures for crime go up year by year. If you were attacked in the street, would you be able to defend yourself? Not very well probably, especially if someone was pointing a gun at you. We all see a lot of violence of films, but recently some programs on television showed how people can defend themselves without guns. For example, in one film a woman was attacked from behind. She threw the man, who was heavier and stronger than she was, over her head. Then she held him tightly on the ground. How? She knew Judo.

Jiu-jitsu, as judo is sometimes called, means "muscle science" in Japanese. The student of judo needs to learn a lot about the body, its bones and muscles. Judo uses a number of "falls", "holds" and "throws". Someone who does not know judo cannot defend himself against them. If you know judo you can defend yourself against a person who is stronger than you. You had better not practice judo on your friends unless they can fall without hurting themselves! Being strong is one thing, but using the body wisely is another. In judo, you use the other person's body to help you. You "throw" him to the ground and "hold" him there, so that he cannot move. Of course, it takes time and practice, but knowing judo is useful. In a violent world you ought to be able to defend yourself.

小题1:According to passage, in fact "judo" is ______.

A.the same as "Jiu-jitsu"

B.a kind of fighting

C. a kind of muscle science

D.is helpful to a strong man小题2:Why does the writer say the world is dangerous?

A. The number of violence and crime is increasing every year.

B.Because many people carry guns.

C.Because there too many films.

D.Because people are not able to defend themselves.小题3:Which of the following statement is true about the woman in the passage?

A.The woman held the man over her head.

B.The woman was heavier than the man.

C.The woman was able to defend herself.

D.The woman attacked the man from behind.小题4:If a man knows judo, he ______.

A.will be good at muscle science.

B.will be able to avoid being attacked from his back.

C.may defeat any strong person.

D.can help himself by using the other person's body小题5:What's the best title for this short passage?

A.How to defend oneself

B.Violence in films

C.How to practise judo

D.Something about judo

填空题