欧美一级特黄aaaa片潘金莲,久久久2020中文字幕,在线日韩视频手机成人一区二区

(Ⅱ)設(shè).求數(shù)列的前項(xiàng)和, 【查看更多】

題目列表(包括答案和解析)

書(shū)面表達(dá)（滿分25分）
為了創(chuàng)造學(xué)校的英語(yǔ)學(xué)習(xí)氛圍，激發(fā)同學(xué)們學(xué)習(xí)英語(yǔ)的興趣，我校將舉行英語(yǔ)演講比賽。請(qǐng)你根據(jù)下面內(nèi)容以學(xué)生會(huì)名義向全校學(xué)生做口頭通知，介紹相關(guān)情況。
活動(dòng)：英語(yǔ)演講比賽
比賽時(shí)間：5月22日下午；地點(diǎn)：報(bào)告廳
比賽要求：
（1）話題從備選的8個(gè)話題中自選
（2）選手每人先進(jìn)行一段20秒以內(nèi)的自我介紹，演講時(shí)間不超過(guò)3分鐘
獎(jiǎng)勵(lì)辦法：各年級(jí)設(shè)一、二、三等獎(jiǎng)
報(bào)名時(shí)間：5月15日前
報(bào)名地點(diǎn)：學(xué)生會(huì)辦公室
注意： 1.詞數(shù)不少于60.
2.通知的開(kāi)頭和結(jié)尾已為你寫(xiě)好。
3.選手：contestant
Boys and girls, I have an announcement to make.
_____________________________________________________________________________
That’s all.
Thank you.

查看答案和解析>>

第二節(jié) 書(shū)面表達(dá)（滿分25分）

假如你是張林，剛進(jìn)入高三學(xué)習(xí)，需要購(gòu)買(mǎi)一本有關(guān)英語(yǔ)書(shū)面表達(dá)的書(shū)，請(qǐng)根據(jù)下列提示，寫(xiě)信給你在外文書(shū)店工作的朋友Jack，請(qǐng)他幫你挑選。

要求

書(shū)的內(nèi)容要求

1．含寫(xiě)作技巧：如文章結(jié)構(gòu)，過(guò)渡詞使用；

2．有多種寫(xiě)作題材及其范文；

3．最好有近三年高考的書(shū)面表達(dá)題。

其它

1．大小同英語(yǔ)課本，厚度不限。

2．最新版本，供2007級(jí)高三學(xué)生使用

3．把書(shū)郵寄到學(xué)校。

要求：1．詞數(shù)100個(gè)左右。

2．不可逐字翻譯，但可適當(dāng)增加內(nèi)容，使行文連貫。

3．參考詞匯：過(guò)渡詞transitional words 版本edition

注：信的開(kāi)頭和結(jié)尾已為你寫(xiě)好，不計(jì)入總詞數(shù)。

Dear Jack,

How are you getting along these days?

I’m in Senior Grade 3 now, and I’m writing to you ask for a favor.

Thank you very much, my dear friend. I wish I hadn’t put you to so much trouble.

Yours,

Zhang Lin

查看答案和解析>>

（本題13分）已知函數(shù)

（1）已知一直線經(jīng)過(guò)原點(diǎn)且與曲線相切，求的直線方程；

（2）若關(guān)于的方程有兩個(gè)不等的實(shí)根，求實(shí)數(shù)的取值范圍。

查看答案和解析>>

閱讀下列應(yīng)用文及相關(guān)信息，并按照要求匹配信息。請(qǐng)?jiān)诖痤}卡上將對(duì)應(yīng)題號(hào)的相應(yīng)選項(xiàng)字母涂黑。

下面是一篇有關(guān)書(shū)籍介紹的應(yīng)用文，請(qǐng)閱讀下列應(yīng)用文和相關(guān)信息，并按照要求匹配信息。

首先請(qǐng)閱讀下列應(yīng)用文：

I Am a Pencil

Sam Swope's job was teaching writing to third-graders in New York City. His students were from 21 countries, speaking 11 languages, with different backgrounds. But there were a few things they had in common. Family troubles, for one. Money struggles. And poetry. Every single student, with the help of this creative teacher, came forth with awesome writing. Swope leaves the reader with the inspiring conviction (堅(jiān)信) that deep within each of us lives a poet.

Between a Rock and a Hard Place

Aron Ralston, 28, went hiking in a remote Utah canyon without telling anyone. An unexpected catastrophe struck. With enough supplies only for a day, Ralston knew his situation was full of danger. Sure enough, after five days he was in a fight against death. That was when he carried out a courageous plan - using a pocket knife to cut off his trapped arm. His amazing survival story rests at a place among the classics of the genre (體裁).

Our Brother's Keeper

Author Jedwin Smith spent 30 years trying to repress (克制) all memories of his brother, Jeff, who was killed in Vietnam. But in Our Brother's Keeper he tells what happens when the Internet brings him into contact with several of his brother's old Marine friends, including the guy who held Jeff in his arms as he died. First via e-mail, and then in person, Smith gets to know these men.

The All Americans

With his graduation from West Point, Henry Romanek sailed toward Omaha Beach on the eve of Dday. It was June 1944, and he was about to face the bloodiest battle of his life. Just yesterday, it seemed, he was a standout soldier on the Army team. Now, he was a leader of youngsters in battle, fighting, quite literally, for his country and the future of the free world. In this book, Lars Anderson retraces Romanek's life and that of three other soldiers.

Copies in Seconds

With the push of a button, anyone can make copies of almost anything - unlike the old days, when papers had to be rewritten long-hand, carbon-copied out of fussy mimeograph machines (蠟紙油印機(jī)). In Copies in Seconds, David Owen showed how a shy engineer named Chester Carlson perfected his xerography machine （靜電復(fù)印機(jī)） and shopped it around until finally hooking up with the Haloid Corporation. That partnership led to the Xerox copier and changed the face of work forever.

State of Grace

Back in the late 1950s and early 1960s, the Lynvets was just a football team in a sandy New York City neighborhood. But to most of its members - the author, Robert Timberg, included - the team was their only experience of a happy family, their only chance to rise above terrible everyday circumstances, their only shot at being heroes. The friendships these men formed sustained (維持) them throughout their lives.

請(qǐng)閱讀以下求書(shū)者的信息，然后匹配他們所要尋找的書(shū)籍：

1. Tom is looking for a book about the hiking stories to help him in his following outdoor activities.

2. Kate wants to find a book about the stories of the soldiers during World War II. .

3. Mark wants to research into the history of technological development.

4. Jack is researching into education in a college. He is especially interested in the teaching methods. He wants to find a book which can tell him something about how to teach students from different backgrounds.

5. John wants to find some materials about the soldiers in Vietnam War to carry on his new research.

求書(shū)者書(shū)籍

1. Tom A. I Am a Pencil

2. Kate B. Between a Rock and a Hard Place

3. Mark C. Our Brother's Keeper

4.Jack D. The All Americans

5. John E. Copies in Seconds

F. State of Grace

查看答案和解析>>

高中英語(yǔ)教學(xué)中教師常常遇到授課的語(yǔ)言問(wèn)題：應(yīng)該只用英語(yǔ)，還是英語(yǔ)、漢語(yǔ)兼用？你校學(xué)生會(huì)就此對(duì)全校學(xué)生做了調(diào)查。很設(shè)你叫李剛，請(qǐng)結(jié)合下表調(diào)查結(jié)果用英語(yǔ)給你的英國(guó)筆友Peter 寫(xiě)一封電子郵件，并發(fā)表你自己的觀點(diǎn)。信的開(kāi)頭和結(jié)尾已給出，不計(jì)入總詞數(shù)。

注意：

1．不要逐句翻譯，可適當(dāng)增加細(xì)節(jié)，使行文連貫；

2．詞數(shù)100左右。

參考詞匯：strengthen 增強(qiáng)

Dear Peter,

Is everything going well? Recently the Students’ Union of our school has done a survey on whether English classes should be taught in English only or in both English and Chinese. Now, I’m writing to tell you about it.

Looking forward to your reply.

Yours,

Li Gang

查看答案和解析>>

1．解析：，故選A。

2．解析：∵

，

故選B。

3．解析：由，得，此時(shí)，所以，，故選C。

4．解析：顯然，若與共線，則與共線；若與共線，則，即，得，∴與共線，∴與共線是與共線的充要條件，故選C。

5．解析：設(shè)公差為，由題意得，；，解得或，故選C。

6．解析：∵雙曲線的右焦點(diǎn)到一條漸近線的距離等于焦距的，∴，又∵，∴，∴，∴雙曲線的離心率是。故選B.

7.解析：∵、為正實(shí)數(shù)，∴，∴；由均值不等式得恒成立，，故②不恒成立，又因?yàn)楹瘮?shù)在是增函數(shù)，∴，故恒成立的不等式是①③④。故選C.

8．解析：∵，∴在區(qū)間上恒成立，即在區(qū)間上恒成立，∴，故選D。

9．解析：∵

，此函數(shù)的最小值為，故選C。

10．解析：如圖，∵正三角形的邊長(zhǎng)為，∴，∴，又∵，∴，故選D。

11．解析：∵在區(qū)間上是增函數(shù)且，∴其反函數(shù)在區(qū)間上是增函數(shù)，∴，故選A

12．解析：如圖，①當(dāng)或時(shí)，圓面被分成2塊，涂色方法有20種；②當(dāng)或時(shí)，圓面被分成3塊，涂色方法有60種；

③當(dāng)時(shí)，圓面被分成4塊，涂色方法有120種，所以m的取值范圍是，故選A。

13．解析：做出表示的平面區(qū)域如圖，當(dāng)直線經(jīng)過(guò)點(diǎn)時(shí)，取得最大值5。

學(xué)科網(wǎng)(Zxxk.Com) 14.解析：∵，∴時(shí)，，又時(shí)，滿足上式，因此，，

∴。

學(xué)科網(wǎng)(Zxxk.Com) 15．解析：設(shè)正四面體的棱長(zhǎng)為，連，取的中點(diǎn)，連，∵為的中點(diǎn)，∴∥，∴或其補(bǔ)角為與所成角，∵，，∴，∴，又∵，∴，∴與所成角的余弦值為。

學(xué)科網(wǎng)(Zxxk.Com) 16．解析：∵，∴，∵點(diǎn)為的準(zhǔn)線與軸的交點(diǎn)，由向量的加法法則及拋物線的對(duì)稱性可知，點(diǎn)為拋物線上關(guān)于軸對(duì)稱的兩點(diǎn)且做出圖形如右圖，其中為點(diǎn)到準(zhǔn)線的距離，四邊形為菱形，∴，∴，∴，∴，∴，∴向量與的夾角為。