【正文】 reason he was successful was that he had worked hard in the past many have many students playing on the have been a debate about this problem since likes English, so is is handsome, so does has finished task, so have is of great useful to remember many English think it is very importance to read many many books is of great helpful to was pity that you couldn’t attend the party last students find difficult to remember English think you should be happy with his mother discovered my diary by the strong man as he is,he has been put to the severe test during the past few ..The teacher came here , patted Jim on his shoulder and went can ask your teacher for advices if you would like my surprised,he has passed the found the book of great has many knowledge of Greece which can help the whole ..The students in our class are making preparation for the ing New ..If you spend a few hours on your appear, you are likely to feel ..I think unfair to punish the boy without listening to his ..He said we only had a couple of hour to prepare for the tried to pass the exam,but to my shocking, I failed ..Lucy felt happy because he had been treated to a delicious number of students has been reduced to 1 % in recent sister saw a lovely cup when we are shopping the other day first time I decide to leave home was when I was upon graduation in high have sometimes accidents on this line, but no accidents have been occurred since last just e back from Britain last whole class divided into three of us often went to school without breakfast。some like to have snacks。some others are particular about food。and still some eat or drink too , reading books not only interests you but also benefits you, for reading was always just for a result, I was tired out and feel sky is full of sunshine, so does my ..On April 16th, we went sightseeing that we believe many people already read this kind of news in newspapers or can tell you the names of the players in of the important has photographs of them and he know the result of large numbers of were very sorry to lose the oldest thing that we have for a long Ming is a student who have been living in Shanghai since he was , if we stress cooperation too much, there would be no ..At that time, I was used to be poor in ..The police is searching the city for a ..I am an outgoing girl who like municating with ..When I first learned to write in English, I run into many ..It’s reported that many people died of traffic accidents each ..In a word, obeying the traffic rules are what all of us should pay attention to particularly.第三篇：初中英語單句改錯題學習方法的練習初中英語單句改錯題學習方法的練習【綜合能力訓練】Ⅰ.下列各題有一處是錯的，請將出并將改正后的詞寫在句后的括號內(nèi)。() is going to have much beef on the plate.()() don’t think his dress is dearer than Kate.()() can’t hear you speak it louder ?()()’s kind for you to help me to do the cleaning.()() Black, a good friend of me, likes drawing horses.()()’t stay at had better to go out for a walk,()() the girls’ 100metre race, Lily from Class 1 ran very fastly.()() is a people in the nobody knows who it is.()() will hold a sports meeting next Monday if it won’t rain.()() boy called Tom was born in the morning of May 2nd, 1990.()() asked me if the Blacks were going to move here long before.() is September the Teachers’ Day to you for teach us so well.()() is much cleverer than any other students in Grade 3, but he doesn’t work hard.()()!Two hundreds students are watching a football match on the playground.()Ⅱ.改正下列句子，每句只有一個錯誤，在錯的地方作出標記，并將改正后的詞寫在句后的橫線上。 you gone to America before？ there new anything in this talk？ Ann nor I are a League are surprise that he lost the great artists like making own up，and you won’t catch the think this song is most popular of Hu got up until ten o’clock a interesting book!Do you like it ? story is not so longer as that ’s a long time since we have met ’s wrong with you ?You look Smith found that difficult to study English is little water in the glass, isn’t there ? boys were playing with fire when he es traffic accident was happened around the corner last show we the picture that you drew Li wants the students do their homework by themselves.[參考答案]綜合能力訓練Ⅰ.→be →Kate39。s →去掉 →of →mine go→go →fast people→aperson 39。t→doesn39。t →on before→before long →teaching →student →hundredⅡ.→been anything→anything new →am →surprised →their own →or →the most →didn39。t get或until→at →an →long met→met →unhappy →it 39。t→is →came happened→happened →us →to do第四篇：2010年高考物理試題分類：機械振動、機械波(帶詳細解析)高中物理吧（）全站精品資源免費開放下載！歡迎收藏訪問！2010年高考物理試題分類匯編——機械振動、機械波（全國卷1）21．一簡諧振子沿x軸振動，平衡位置在坐標原點。t=0時刻振子的位移4x=；t=s時刻x=；t=4s時刻x=。該振子的振幅和周期可能為388A． m，sB． m, 8sC． m，sD． m，8s 33【答案】A△t2 △t1 【解析】在t=43s和t=4s兩時刻振子的位移相同，第一種情況是此時間差是周期的整數(shù)倍443=nT，當n=1時T=83s。在43s的半個周期內(nèi)振子的位移由負的最大變?yōu)檎淖畲蟆正確。第二種情況是此時間差不是周期的整數(shù)倍則(430)+(443)=nT+T2，當n=0時T=8s。如圖答案D。【命題意圖與考點定位】振動的周期性引起的位移周期性變化。（全國卷2）。已知t=0時的波形如圖所示，則A．波的周期為1s B．x=0處的質(zhì)點在t=0時向y軸負向運動C．x=0處的質(zhì)點在t= 14s時速度為0 D．x=0處的質(zhì)點在t= 14s時速度值最大答案：AB 解析：由波的圖像可知半個波長是2m，波長是4m，周期是T=lv=44=1s，A正確。波在沿x軸正方向傳播，則x=0的質(zhì)點在沿y軸的負方向傳播，B正確。x=0的質(zhì)點的位移是振幅的一半則要運動到平衡位置的時間是13180。T4=1112s，則t=4時刻x=0的質(zhì)點越過了平衡位置速度不是最大，CD錯誤?！久}意圖與考點定位】本題屬于波的圖像的識圖和對質(zhì)點振動的判斷。（新課標卷）33.[物理——選修34](2)(10分)波源S1和S2振動方向相同，頻率均為4Hz， 您的良師益友！高中物理吧（）全站精品資源免費開放下載！歡迎收藏訪問！O、A兩點處，OA=2m，波速為4m/：（i）簡諧波的波長；（ii）OA間合振動振幅最小的點的位置。解析：（i）設波長為l，頻率為v，則v=ln，代入已知數(shù)據(jù)，得l=1m。（ii）以O為坐標原點，設P為OA間的任意一點，其坐標為x，則兩波源到P點的波長差為Dl=x(2x)，0163。x163。2。期中x、Dl以m為單位。合振動振幅最小的點的位置滿足Dl=(k+)l，k為整數(shù)解得：x=，。（北京卷）17．一列橫波沿x軸正向傳播，ａ，ｂ，ｃ，ｄ為介質(zhì)中的沿波傳播方向上四個質(zhì)點的平衡位置。某時刻的波形如圖1所示，此后，若經(jīng)過3／4周期開始計時，則圖2描述的是Ａ．ａ處質(zhì)點的振動圖像Ｂ．ｂ處質(zhì)點的振動圖像 Ｃ．ｃ處質(zhì)點的振動圖像Ｄ．ｄ處質(zhì)點的振動圖像 答案：B 【解析】由波的圖像經(jīng)過3周期，a到達波谷，b達到平衡位置向下運動，c達到波峰，d4達到平衡位置向上運動，這是四質(zhì)點在0時刻的狀態(tài)，只有b的符合振動圖像，答案B。（上海物理）,b所示，則（A）圖a、b均顯示了波的干涉現(xiàn)象（B）圖a、b均顯示了波的衍射現(xiàn)象 您的良師益友！高中物理吧（）全站精品資源免費開放下載！歡迎收藏訪問?。–）圖a顯示了波的干涉現(xiàn)象，圖b顯示了波的衍射現(xiàn)象（D）圖a顯示了波的衍射現(xiàn)象，圖b顯示了波的干涉現(xiàn)象 答案：D解析：本題考查波的干涉和衍射。難度：易。（上海物理），這是因為（A）聲波是縱波，光波是橫波（B）聲波振幅大，光波振幅小（C）聲波波長較長，光波波長很短（D）聲波波速較小，光波波速很大 答案：C解析：本題考查波