【題目】2016年6月25日20時(shí)00分07秒，長(zhǎng)征七號(hào)運(yùn)載火箭從海南文昌航天發(fā)射中心首次發(fā)射，成功將載荷送入預(yù)定軌道，任務(wù)取得圓滿成功。如圖所示，長(zhǎng)征七號(hào)多級(jí)火箭發(fā)射時(shí)，第一級(jí)火箭點(diǎn)火后，使衛(wèi)星向上勻加速運(yùn)動(dòng)的加速度為50 m/s2，燃燒30 s后第一級(jí)脫離，第二級(jí)火箭沒有馬上點(diǎn)火，所以衛(wèi)星向上做加速度為10 m/s2的勻減速運(yùn)動(dòng)，10 s后第二級(jí)火箭啟動(dòng)，衛(wèi)星向上的加速度為80 m/s2，這樣經(jīng)過1分半鐘第二級(jí)火箭脫離時(shí)，衛(wèi)星的速度多大？
請(qǐng)你用v-t圖象描述這一過程。
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假定英語課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫的以下作文。文中共有10處語言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。
增加：在缺詞處加一個(gè)漏字符號(hào)(∧)，并在其下面寫出該加的詞。
刪除：把多余的詞用斜線(＼)劃掉。
修改：在錯(cuò)的詞下畫一橫線，并在該詞下面寫出修改后的詞。
注意：
1. 每處錯(cuò)誤及其修改均僅限一詞；
2. 只允許修改10處，多者(從第11處起)不計(jì)分。
Which is known to all, nowadays the Internet is playing more and more important part in our daily life. In it, we can not only read news at home and abroad but also get so much information as possible. We are often send e-mails to our classmates. We can make telephone call to our families as well as our friends. However, we can go to school on the net, read different kinds of books and even teach myself English. We can also enjoy music, watching sports and play computer games on the Net. We could do shopping even without leaving our homes.
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【題目】B
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Katharine Graham was born in New York in 1917. Graduating from the University of Chicago in 1938, Katherine got a job as a reporter for a newspaper in San Francisco, California. In 1933, Katharine’s father bought a failing newspaper, The Washington Post. It was the least successful of five newspapers in Washington.
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假定英語課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫的以下作文。文中共有10處語言錯(cuò)誤，每句中最多有兩處。錯(cuò)誤涉及一個(gè)單詞的增加、刪除或修改。
增加：在缺詞處加一個(gè)漏詞符號(hào)（∧），并在其下面寫出該加的詞。
刪除：把多余的詞用斜線（\）劃掉。
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注意：
1. 每處錯(cuò)誤及其修改均僅限一詞；
2. 只允許修改10處，多者（從第11處起）不計(jì)分。
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