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在三角形ABC中 ,a+b=10,而cosC值是2x^2-3x-2=0的一根 ,求三角形周长最小值. 阅读回答问题：Mrs Smith loves flowers.She has a small but lovely garden.In spring,herflow-ers are always the best in her in her street. One day,a boy comes to her house.He is about seven years old and he has a lot of flowers in his hands.She Is Mrs. Smith beautiful? No, but she _______. A uIs Mrs. Smith beautiful?No, but she _______.A used to B used to doC used to doing D used to be此题为什么选答案D, 请详细分析一下,十分感谢. 英语学习报Mr,Black worked for Mrs White,She was old fat and（16)rich.he worked in her garden （17）Mrs White did not know anything about the garden,but she always told him to do this or not to do that.This made Mr Black very angry.So he calle 29、30题, 29和30题 为什么圆心到切线的距离等于圆的半径 圆心到直线的距离等于半径是这条直线为圆的切线的必要条件 Mrs Green has a very kind h_.She often tries her best to help others. 翻译she will try her best to improve her spoken English. pascal N只猴子选大王 恩 程序尽量简单.初学者水平N只猴子选大王.选举办法如下：从头到尾1、2、3报数,凡报3的退出,余下的从尾到头1、2、3报数,凡报3退出；余下的又从头到尾报数,还是报3的 一道非常简单的pascal题目,求大师用最简洁的方法做一下,N只猴子选大王.选举办法如下：从头到尾1,2,3报数,凡报3的就退出,余下的从尾到头1.2.3报数,凡报3的退出；以此类推,当剩下两只鸡的时 猴子选大王pascaln只猴子选大王,选举办法如下：从头到尾1,2,3报数,凡报3的退出,余下的从尾到头1,2,3报数,凡报3的退出．．．如此类推,当剩下两只猴子时,取这时报1的为王,若想当猴王,请问当初 英语试题(选择括号内词）During the weekdays ,people wear suits.But on weekends ,people usually dress more ________(casual,casually) 从括号中选出选择适当的词1.Would you like one of (this/these) pieces of gum?2.I am sending (that/those) card to my grandmother.3.(That/This) red car on the other side of the parking lot belongs to my sister.4.Have you seen (this/those) pic 请问括号里的词语应怎样选择? “1851年英国伦敦世博会成功举办后,英国在国际舞台上声誉大增,世界各国（ ）,争做主办国,掀起了一场持久不衰的博览会热潮.”括号中应该选用的词语是：A.群起效仿 B.群起效尤 C.趋之若鹜 找规律4 12 9/6 24 /7 35 30求~ she wants _____(buy) a book用所给动词的适当形式填空 It's a w____ March morning.Mary r____ to a book store.She wants to b____some books in English a...It's a w____ March morning.Mary r____ to a book store.She wants to b____some books in English about Canada.She k____it is a beautiful country and cold i 怎样让类似选择题一样的几行字选项变成一行? 今年四川高考语文试题选择题第二题B选项哪个词语的哪个字错了 证明经过两次反射后的反射光线会逆向射回 两面平面镜a,b夹角∠3=90°时,任何射到a上的光线,经过a,b的两次反射后,入射光线m反射光线n平行,说明理 两平面镜A,B的夹角为P,入射光线CO平行于B入射到A上,经两次反射后的出射光线XD平行于A,则角P是多少度? 波长245nm, 波长450nm,这nm怎么念? 比如光强单位cd,念成坎德拉. 那nm怎么读呢? 谢谢 神偷奶爸2的经典10句英语对白,最好带有翻译的 描写心轻痛苦的句子 She went to a bookshop to buy a book. june she tianjin to in went 组成句子---------the flowers ____dinner 英语翻译是几个小对话.请大家翻译的是括号里的话,1.A：Can you translate this for me?(B:You can get a rough translation online.)2.A:Good evening(B:I’ll buy you dinner.)3.A:When’s your birthday?(B:Sorry but I am not saying.)4.A: