求详细解答过程_百度知道
求详细解答过程
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占位等shang&#8198;tu
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太给力了，你的回答完美解决了我的问题！
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其他2条回答
过o做bc垂线
脚obc=脚ocb
ox=ox,oxb=oxc=九十度
所以三角形一样，所以ob=oc
2.结论af垂直bc
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出门在外也不愁求详细解答，_百度知道
求详细解答，
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&#65532，∴∠1=∠3．在△DFA和△DCE中&#65532，∴△DCF为等边三角形．∴∠3+∠4=∠4+∠5=60°．∴∠3=∠5．∵∠1+∠ADE=∠2+∠ACE：在CA延长线上取CF=CD，然后求证△ADF≌△EDC即可．（2）归根究底仍是求两条线段的问题，∵CF=CD，通过求证全等；&#65532，直线a∥AB；可围绕结论寻找全等三角形，最终得出几条边之间的关系．【答案】（1）证明，使CF=CD，连接DF．∵△ABC为等边三角形，∴△FCD为等边三角形．∵∠1+∠2=60°，∴∠1=∠2．在△ADF和△EDC中如图△ABC为等边三角形;，给出你的结论并证明．【解析】（1）实际上也就是求两条线段相等：在AC上取点F、CA满足CE+CA=CD，∵∠ADE=∠2+∠3=60°；证明，使CF=CD，也可证．【点评】本题考查了全等三角形的判定与性质及等边三角形的性质，CD，可证．证法（三）过点D分别向CA、CE作垂线，D为直线BC上一点，在AC上取一点F：证法（二）以CD为边向下作等边三角形，连接DF．∵∠ACB=60°;（2）若D在CB延长线上，且∠ADE=60°．（1）若D在BC上（如图1）求证CD+CE=CA，运用全等三角形的性质判定线段相等，&#65532、CE，∴∠ACD=60°;、CA存在怎样数量关系、CE;∴△ADF≌△EDC（AAS）．∴CE=AF．∴CD+CE=CF+AF=CA．（2）解：CD，∴△DFA≌△DCE（ASA）．∴CE=FA．∴CE+CA=FA+CA=CF=CD．注，∠ADE交直线a于点E
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你的回答完美的解决了我的问题，谢谢！
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出门在外也不愁求详细解答：阅读理解.
A The story of English language is a story of change
. The old English language, or old English, is quite
different from Modern English. If we do not study old English, we can&#39;t understand it. Some of_百度作业帮
求详细解答：阅读理解.
A The story of English language is a story of change
. The old English language, or old English, is quite
different from Modern English. If we do not study old English, we can't understand it. Some of
A The story of English language is a story of change
. The old English language, or old English, is quite
different from Modern English. If we do not study old English, we can't understand it. Some of the words
are the same, but many are not used now. The story of the English language begins some time after the year
400 AD. At this time, some people came to England from North-west Europe. There were many groups of
people. They were called Angles (盎格鲁人), Saxons (撒克逊人) and Jutes (朱特人), whose language, old
English, is like some of the modern language of North-West Europe. In old English, the ending had many
meanings. They showed past time and present time and many other things. In Modern English, most of these
endings are gone. This is the biggest difference between Old and Modern English.
1. What does the first sentence of the passage mean?
A. The story of English language often changes.
B. English is a language that has changed a lot as time passes by.
C. The old English language has changed into Modern English.
D. The story of English language is one of how people change the language.
2. Old English has a story of ____.
A. 2,500 years
B. more than 1,600 years
C. 2,300 years
D. more than 400 years
3. Old English was first used by the people from ____.
A. Old English
B. English
C. North-West English D. North-West Europe
4. Which of the following is
true about Old English?
A. The endings of words gave different special meanings.
B. It is easy for most English-speakers today to understand the language.
C. Its words are completely different from those Modern English.
D. It was spoken by many groups of the people from North-West Europe.求详细解答：阅读理解.
&&&& One day a tiger catches (抓住) a fox (狐狸) in the forest. Before the tiger could eat him up, the fox cries out, &You can&#39;t eat me. Don&#39;t you know that I&#39;m king (王) of the forest. If you eat me up, _百度作业帮
求详细解答：阅读理解.
&&&& One day a tiger catches (抓住) a fox (狐狸) in the forest. Before the tiger could eat him up, the fox cries out, "You can't eat me. Don't you know that I'm king (王) of the forest. If you eat me up,
&&&& One day a tiger catches (抓住) a fox (狐狸) in the forest. Before the tiger could eat him up, the fox cries out, "You can't eat me. Don't you know that I'm king (王) of the forest. If you eat me up, all the other animals in the forest will be angry with you."The tiger doesn't believe him."How can such a small animal be king of the forest?" He asks himself. "If you don't believe (相信) me," the fox says,"then take a walk with me in the forest. You can see for yourself whether (是否) they are afraid of me."The tiger thinks it is a good idea, so the fox
walks in front and the tiger goes behind. When the other animals see the tiger coming, they run away as fast as they could.
&&&& "See for yourself, Mr Tiger," he calls out quickly. "All the animals are afraid of me."
&&&&& "Yes, yes," the tiger says. "You are quite right." He then lets the fox go.
1. One day a tiger catches a ________. 　
C. cat 　　 D. fox
2. The fox walks ________ the tiger. 　　　
A. in front of
B. in the middle of 　　　 C. behind　　　
3. In fact (事实上) the other animals are afraid of the ________.
C. dog D. elephant
4. When the other animals see the tiger, they ________.
A. are angry
B. are happy
C. run off
D. are sad
5. Does the tiger eat the fox at last?&
A. Yes, he doesn't.
B. No, he does. C. No, he doesn't.
D. Yes, he does.
1-5&&&&&& DABCC求答案和详细解答_百度文库
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