If you do not use your arms or your legs

题型:阅读理解

问题:

If you do not use  your arms or your legs for some time, they will become weak; when you start using them again, they will slowly become stronger again.Everybody knows that .yet many people do not seem to know that memory works in the same way.When someone says that he has a good memory, he really means that he keeps his memory in practice by using it.

When someone else says that his memory is poor, he really means that he does not give it enough chance to become strong.If a friend says that his arms and legs are weak, we know that it is his own fault.But if he tells us that he has a poor memory, many of us think that his parents are to blame, and few of us know that it is just his own fault.Have you ever noticed that some people can’t read or write but usually they have better memories? This is because they cannot read or write so they have to remember things; they cannot write them down in a little notebook.They have to remember days, names, songs and stories; so their memories are being exercised the whole time.So if you want to have a good memory, learn from these people:Practise remembering.

小题1:One has a poor memory mainly because       

A.his father or mother may have a poor memory

B.he does not use his arms or legs for some time

C.his memory is not often used

D.he can’t read or write小题2:If you do not use your arms or legs for some time,       .

A.you can’t use them any more

B.they will become stronger

C.they become weak and won’t become stronger until you use them again

D.they will become neither stronger nor weaker小题3:Which of the following is NOT true?

A.Your memory works in the same way as your arms or legs.

B.Your memory, like your arms or legs,becomes weak if you don’t give it enough chance for practice.

C.Don’t learn how to read and write if you want to have a better memory.

D.A good memory comes from more practice.小题4:Some people can’t read or write, but they usually have better memories, because       .

A.they have saved much trouble

B.they have saveed much time to remember things

C.they have to use their memories all the time

D.they can’t write everything in a little notebook小题5:Which is the best title for this passage?

A.Don’t Stop Using Your Arams or Legs

B.How to Have a Good Memory

C.Strong Arms and God Memories

D.Learn from the People

考点:科教类阅读
题型:阅读理解

肾虚水泛、肾精不足、肾气不固三证的共同特点是()

A.腰膝酸软

B.身体浮肿

C.发育迟缓

D.滑精早泄

E.经闭不孕

题型:阅读理解

下列哪项不是骨纤维结构不良的X线表现()

A.骨皮质膨胀,无骨膜反应

B.颅骨硬化及颅底畸形

C.骨干囊状透亮区,呈磨砂玻璃状

D.骨骺延迟闭合,无病理骨折

E.病变呈多房状

题型:阅读理解

应用化学知识解释或解决生活中的问题:

小煌按如图所示配方自制一瓶果汁汽水.请回答:

①含量最多且是人体重要营养素之一的物质是(写化学式)          

②测汽水的酸碱度可用                                    

③柠檬酸是一种酸.汽水中的气体是柠檬酸与配方中的       反应生成的,该成分可治疗胃酸过多,用化学方程式表示其原因:                                                  

(2)氢氧化镁是一种新型的阻燃剂。当温度达到380℃时,氢氧化镁开始分解出水蒸气,同时生成耐高温的氧化镁固体。利用氢氧化镁这一性质,将它添加在塑料等易燃性材料中能起阻燃作用。根据灭火原理初步分析氢氧化镁能作阻燃剂的原因(答一点)                                 

(3)泡沫铁粉(铁粉包裹在泡沫塑料中)是一种新型的食品干燥剂和保鲜剂,当它露置于空气中,一段时间后会变成铁锈.为检验某泡沫铁粉是否还有效,可向其中滴加盐酸,若看到             现象,说明还有效;

(4)同温、同压下,相同体积的不同气体具有相同的分子数。原来以一氧化碳为燃料的家庭若要改用天然气作燃料,灶具的改进方法为:         

A.减少空气的进入量,增大天然气的进入量

B.增大两者的进入量

C.增大空气进入量或减少天然气的进入量

D.减少两者的进入量(5)生活中常用                                   的方法降低水的硬度。

题型:阅读理解

有两个基因位于同一染色体,它们之间的交换值为50%,另有两个基因位于不同的非同源染色体上,你能将它们区分开来吗?说明之。

题型:阅读理解

压力增大时,有利于体积增大的化学反应。

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