若x =-2是方程mx-6 =15+m的解.则m = . 查看更多

 

题目列表(包括答案和解析)

下图表示人体内某些淋巴细胞的分化和免疫过程。数字表示过程,字母表示细胞或物质。请分析并回答:

(1)造血干细胞转变为a、b、c等细胞的过程被称为_________。
(2)③过程是在X的刺激和a细胞等的参与下共同完成的。与③过程相比,④过程的应答特点是______。
(3)⑤过程的产物Y的化学本质是_____,参与其合成并分泌的膜性细胞器         、高尔基体及线粒体。
(4)若X是禽流感病毒,则患者体内消灭X必须依靠a增殖分化的淋巴细胞去裂解__ _ ___。如果X是HIV,则由于图中___  ___细胞的大量死亡,导致患者几乎丧失一切免疫功能而死亡。

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如图,ABCD,若∠2是∠1的两倍,则∠2等于  (  )
A.60°B.90°C.120°D.150°

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根据下列句子及所给单词的首字母,在答题纸上按题号写出各单词的完全形式(每空限填一词)。

1.Linda had a sore throat , she c a lot , her mother asked her to take an X-ray.

2.Tina tells of the importance of making a good d________, and of being in control of one’s life.

3.--What happened to the shop?

--I’m not sure. Some policemen are waiting for the o of the shop now.

4.Last week, he v at an after-school study program. He helped the kids read some interesting books.

5.Sally wants to put o______ making a plan to work in an animal hospital until next summer. She’s too busy with her studies this year.

6.Tom lost the basketball match yesterday, so he is so sad now. Let’s do something to c_____ him up.

7. We had a long j in the countryside. We took a lot of photos and had a picnic with the farmers. We felt very tired.

8.After the earthquake, thousands of people became d . Some of them lost their arms or legs, they need our help.

9.If you don’t u the meanings of the words, please look them up in your dictionary or ask the teacher for help.

10.A Malaysia airplane was missing on March 8th, can you i what happened to this plane? Was it exploded (爆炸)or being hijacked (劫持了)?

 

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根据括号内的汉语提示,完成句子。( 每空一词 )

温馨提示:注意大小写。

1.—Can you give me _____(一个) orange?

    —Yes. Here you are.

    —_________(谢谢) you.

2.—________ (是)this your watch, Jack?

    —No,it ________(不是).

3.I am happy to ______(见到) you. How do you _____(拼写) your name?

4.______(他的) name is Jim. And ______(她的) name is Linda.

5.________(那是) my ruler. It is very ______(好的).

 

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以下图1—2是一个“魔术绳”的表演,另外五张图是该魔术的解密步骤。请参照解密图,将阅读材料A—E正确排序

A.  Now pick up the scissors. Hold the paper carefully and cut through it. Keep the small piece of string between you and the scissors, so you do not cut the string.

B.  “Magic string” is a popular magic trick. You can do this trick for your friends or family. You just need a piece of paper, a piece of string and some scissors. That’s all.

C.  Pick up the paper and fold side A down. Now your friends can see side B, but they can’t see side A. Side A is shorter than B, so it does not cover the string. Push the middle of the string up, and fold C up over A. Now most of the string is inside the paper, but a small piece of the string is outside. You can see it but your friends can’t.

D.  Put one hand over the paper, and then pull the string out slowly with your other hand. The string is still in one long piece!

E.  First, fold the paper so that it is like the paper in the picture. Side A is shorter than side B, but not much shorter. Side C is much shorter than Side B. Show the long piece of string so that people can look at it. Put this piece of string on the paper.

1.___________ 2. __________  3.__________ 4. ______________ 5. ________

 

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