望江南超然台作

画出下列函数的图像F(x)=｛0,x≤0;1,x＞0｝请画出F（X）={0,X≤0} {1,X>0} 请画出0≤x≤3的函数图像 如图,已知平行四边形ABCD的对角线AC与BD相交于点O,AE垂直BD于点E,角DAE=60度AE=2cmAC+BD=12cm求三角...如图,已知平行四边形ABCD的对角线AC与BD相交于点O,AE垂直BD于点E,角DAE=60度AE=2cmAC+BD=12cm求三角形的 如图,已知平行四边形ABCD的对角线AC与BD相交于点O,AE⊥BD于点E,∠DAE=60°AE=2cm,AC+BD=12cm.求△BOC的周如图,已知平行四边形ABCD的对角线AC与BD相交于点O,AE⊥BD于点E,∠DAE=60°,AE=2cm,AC+BD=12cm.求△BOC的周 如图,BD是平行四边形ABCD的一条对角线,AE垂直BD于点E,CF垂直BD于点F,求证∠DAE=∠BCF The old man walked slowly into the restaurant.With head tilted,and shoulders bent forward he lean翻译 数学问题：若三棱锥的三个侧面两两垂直,且侧棱长均为（根号2）则其外接球的体积是＿＿?（麻烦回答一下 A young man walked into the house.There were some flowers in his hands.合成一句话 已知三棱锥S-ABC的三条侧棱两两垂直,且长度分别为根号6,2根号3,3 ,则三棱锥S=ABC的外接球的体积为 ___ 在平行四边形ABCD中,AC交BD于点O,AE⊥BD于E,角EAD=60°,AE=2cm,AC＋BD=14cm,求△BOC的周长 如图,已知平行四边形ABCD的对角线AC与BD相交于点O,AE⊥BD于点E,∠DAE=60°,AE=2cm,AC+BD=12cm,求△BOC的周长?（没有图,写清楚谢谢） 在平行四边形ABCD中,O为对角线的交点,AE⊥BD于E,∠EAD=60°,AE=4CM,AC+BD=28CM,则△BOC的周长为 借鉴英美两国历史发展经验,结合中国的历史与现实,为中华民族复兴提出两条合理化的建意 打算7月底考雅思 想买听力写作口语阅读的雅思机经,给推荐一下,要做题的那种 你好,那个听力和口语的雅思机经怎么需要口令密码?能告诉我一下么,我用的克克PDF阅读器. 第二题的答案 The old man walked very slowly.中哪个是不及物动词?哪个是介词? 第二题答案是 He drives the car very slowly怎么变感叹句 Some dinosaurs walked very slowly.（对slowly提问）_____ _____ _____ dinosaurs walk? 三棱锥的三条侧棱两两垂直,其长分别是1,根号2,根号3,求1 三棱锥的体积2 三棱锥外接球的表面积和体积 等比数列中,A3A4A5=8,则A2A6等于什么? .______ his head high,the manager walked into the room to attend the meeting ______ then. A.Holding;being held B.Held;holding C.Having held;held D.Held;to be held 我选D为什么错了 正确答案是A Someone got into his room (穿过) the window yesterday afternoon 帮我画个函数图像,不用真画描述下就行!y=1.5^x与y=x^2的交点有几个?我觉得由2个,书上非说是三个! The old man and his wife ___________(走路比较慢) walkersThe old man and his wife ___________ walkers. Once a man and his wife worked for an old man.完形填空Once a man and his wife worked for an old man.There was a big box in the old man’s living room.The old man pointed to the box and said,“There’s only one thing you （1 ）do.Don’t open When the man left the following morning,he t___the farmer and his wife.He took a little bag ofgold pieces out of his pocket.he added that he would come the next y____.(填横线中的词) the old man took the little girl by () hand and they went down the streetA her B a C the D that到底选哪个？ Lightly into the meeting room A the lady walked B did the lady walked答案说B不对 因为walked 要用原形 为什么呢 1,is no reason for firing himA The fact that he disagreed with you B Because he disagreed with you C Owing to disagreeing wit What would you do if an old man fell down开头：a reporter did a survey about "what would you do if an old man fell down?"among 200 students.here are the results.结尾：the rest said it depended on how things went. 是“I saw an old man fall down”还是“I saw an old man fell down”已看到摔倒的全过程