三氧化二铱

若F'(x)=f(x),则下列结论正确的是：(a)若f(x)为奇函数,则F(x)为偶函数(b)若f(x)为偶函数,则F(x)为奇函数(c)若f(x)为周期函数,则F(x)为周期函数(d)若f(x)为单调函数,则F(x)为单调函数要求 给出正确答案 A*x=0的基础解系那个题 一道英语选择题（二选一即可）( )me around the campus.A.show B.introduce选哪儿个是对的 You don't need to describe her.I（ ）her several timesA,had met B,have met C,met D,meet2,It's reported that Yangyang in one of the top women（ ）made great contribution to our societyA,who B,whom C,what D,which 英语选择题（2道,要原因）1.The students are busy_______over their lessons.A.going B.with C.to go D>with going2.I_______a tie for my father as his fortieth birthday.A>have had B.have bought C.have paid D.have brought 2道英语选择题...原因.----Have you considered ___ your job?----No,I consider my job ____interesting .A to change,to be B to be changing,as C changing,being D changing,/ 21.Charles Babbage is generally considered ___ the first computer.A to inv 2道英语选择题,要有原因1、There is ____ work to do at school.A、 many B、a few C、few D、a lot of2、The teacher is talking ______ my mother _____ my study.A、to,with B、with,about C、with,to D、to,to 英语选择题2道要原因1.The bus is coming.Oh,no!It's full.I'm afraid we can't_____.A.get up B.get on2.The pair of jeans looks very nice,would you like to_________?A/try them on B.try it on 要理由1.---is it from your home to the airport?A.How often B.How soon C How long D.How far.2.A policeman saw a thief----- a girl's mobile phone in the bus and caught hin at onceA to steal B stealing C stole D steals.请说理由和答案 2道英语选择题,给出理由1、 The boy and the girl each________a dictionary.have 问：为什么不能选has呢?2、Are you busy?No,not a _____.bit 问：为什么不可以选lot另外,弱弱的问一句,look up可以和in the dictionary用在 英语高手来帮做2道选择题.请给出理由.A power struggle,however,is under way between Pirard,a Jansenist,and a pro-Jesuit __led by the Vice Principala.facility b.faculty c.faction d.fatalityThey were testing the __ of drinking alcohol on a 说明理由1.The fastest thing in space is light.Light travels ______ 300,000km per second.A.at a speed of B.with the speed of C.at a speed about D.with the speed about2.Lucy is waiting _______ No.3 bus stop _______ her father.A.for...for B.for ...a 1.She works _________ as her sister.A.as hardly as B.not as good as C.as carefully as D.not as better as2.I was too sad to _________ last night.A.feel sleepy B.fell sleepyC.felt asleep D.fall asleep 1,Look,Simon,（ ）MP4 that I bought last year isn't workingA,a B,an C,the D,不填2,——What can I do for you?———I want_____MP4 player for my daughterA,a B,an C,the D,/ 24.When Jane ________goodbye to her Chinese friends,she could hardly hold back her tears.A.tells B.tell C.waves D.waved 25.They are well________ with each other since they once studied in the same university.A.identified B.recognized C.acknowledged D 1、People who live in a small village are bound to see a good of each other.A quantity B amounat C deal D degree2、The teacher showed the new student to do.A what B how C that 最好说明原因 ________ into the office ______ the telephone rang.选CA、He hardly got;whenB、He had hardly got;thanC、Hardly had he got;whenD、He hardly had got;than解释下原因,并翻译She ought to ____ to finish it before 12 o 'clock.A、askB、been aske 英语选择题,秒采纳! The light in the office is still on.　　---- Oh,I forgot___.　　A.turning it off　B.turn it off　C.to turn it off　D.having turned 　　it off （）left the building,when the bomb went off.A：Hardly have we B：Hardly we hadC：hardly had we D：If we E：we had no sooner Tom doesn't really know______captainA.whom of them he should makeB.who of them should he makeC.which of them he should makeD.who of them he should make.为什么选C不是指人吗 怎么又变成which了Your father didn't take the medicine last nigh 英语选择题12—15 The world _____ is make upA.where we live in B.we live in 但我不明白为什么不能选A 该怎么样去分析题目 Mr.White _____ at our office three times in the last week,and each time he _____ for you.A.called; was B.called; has beenC.has been calling; is D.has called; was 三道小小的选择题 英语 1.where did you go______ last year ,kitty?A.for fun B.for sightseeing 我觉得因该选B 中文通点 kitty，你去哪儿旅游 但答案上是A2.what would you suggest the tourists ______?A.do B to do C doing D done第三题是划线提问we can f 1.He gained his __ by printing __ of famous writers.a.wealth;work b.wealths;works c.wealths;work d.wealth;works这题答案选的是d.搞不懂为什么这么选.2.Here's my card.Let's keep in __.我在选项touch 和 connection中产生了疑问.保 Tian announced his _A_as a driver on March 25.2007.A.retirement B.retiring 为什么不能认为是sb'doing?___I admire David as a poet,I don't like himAmuch as B.Only if C.If only D.as much不懂为甚选AWe had to wait half an hour_B__we had alread 1,what do you _____ having for dinner?I____to have some fish.a.feel like;feel likeb.would like;would likec.feel like;would liked.would like;feel like2,after middle school,my sister plans_____ and further her studies.A.go abroad b.going abroad c.to go 1.A large number of books __for the library and the number of the books needed__500.A.is needed ;is B.are needed;are C.are needed;is D.is needed;are2.I don not think ___necessary to read so many useless books.A.that B.this C.one D.it3.The police have 1 、 when they () at the airport ,it was raining.A arrive B arrives C arrival D arrived 2 Mum,do you se my pencil?I can not find it now.I see it.it is () your textbook.A below B down C up D in 3 how many trees did you plant yesterday?we did not coun 初二生物选择题色盲基因位于X染色体上,是隐性遗传,在患者的性别中()A.全是男性B.男女一样多C.全是女性D.男性多于女性帮忙做一下,要解题思路谢谢