【正文】 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。（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。如圖答案D。t →on before→before long →teaching →student →hundredⅡ.→been anything→anything new →am →surprised →their own →or →the most →didn39。第二篇：高考英語單句改錯(一)高考英語單句改錯（一） enjoyed your trip very much because you had got to lots of place of ’s house is big,about twice as big as you know the reason for his fall down yesterday? excitement of have a holiday wears off quickly,especially after we see how much work we found reading is important for us and it is helpful to our daily study attained an independence in 1947,after a long we made mistakes ,the teacher pointed out with asked Bill and Peter to go on a piic with him,but either of them wants to ,because they have work to strongwilled can reach the other addition the school,the village has a clinic,which was also built with often look in the words I don’t know in the dictionary or on the heard of the trees are homes for animals both on land and the society develops, people will enjoy better life in reason in being late was that I got up don’t believe the reason why he reason we have talked about is we don’t have enough 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。 be: 非謂語動詞錯誤：consider后的賓語補足語用動詞不定式。: 代詞錯誤：it在句中作形式主語。（19）: 介詞錯誤：marry后只能跟介詞to。: 非謂語動詞錯誤：雖然leave后既可跟現(xiàn)在分詞，也可跟過去分詞，但意義大不一樣，現(xiàn)在分詞表示主動，而過去分詞表示被動。另外，while引導的從句多用進行時態(tài)。本句的意思是：“警察搜查村子”。: 連詞錯誤： 本句in后所跟句子為賓語從句，從句中如果成分完整，用that引導賓語從句。 few: 不定代詞錯誤：few表示否定，“沒人喜歡音樂”；a few表示肯定，“只有幾個人喜歡音樂”。（15）: 動詞使用錯誤：catch為瞬間動詞。: 主謂一致錯誤：much 表示不可數(shù)名詞，作主語時，謂語動詞用單數(shù)。: 非謂語動詞錯誤：現(xiàn)在分詞作伴隨狀語。 / which: 連詞錯誤：定語從句中的spent是及物動詞，需用代詞作賓語。（12）: 連詞錯誤：suggestion后跟同位語從句。 have:習慣表達錯誤：stop doing sth “停止正在做的事”；stop to do sth “停下來做另一件事”。 of: 連詞介詞混淆：because是連詞，后面要跟句子；because of是介詞，后面跟名詞或動名詞。: 連詞錯誤：比較級后用than 表示范圍。: 介詞錯誤：look up…in…在?里查。: 連詞錯誤：系動詞is前為主語從句。: 不定代詞錯誤：not more than “不到?”修飾數(shù)詞；more than修飾數(shù)詞時表示“比?多”；修飾名詞時表示“不僅僅”。: 動詞錯誤：“大學時他留長發(fā)”，wear有“留著，戴著”之意，keep無此意。 改為 jobs: 名詞錯誤：work表示“工作”時為不可數(shù)名詞。: 非謂語動詞錯誤：“使自己被別人?” 用 make oneself done 句型。在從句中作狀語用why；在從句中作主語或賓語用that。 后加like:習慣表達錯誤：表示“?是什么樣子/ 怎樣？” 用 what is…like?(5) 改為 seen: 非謂語動詞錯誤：現(xiàn)在分詞作狀語，其動作必須由句子的主語發(fā)出?！?cut 改為are being cut: 時態(tài)錯誤：根據(jù)句意，“熱帶雨林正在快速被砍伐和燒毀，不遠的將來將從地球上消失”可判斷。第一個what是被強調(diào)部分，所以后面應(yīng)該用連詞that而不是what。 改為 in: 介詞錯誤：hand out “分發(fā)”； hand in “上交”。表語形容詞各有自己的修飾詞。 改為 stay: 動詞錯誤：last和stay都有“持續(xù)”的意思，但last 是不及物動詞，后面不能跟東西；stay在此句中為系動詞，后面可以跟形容詞，名詞或副詞?！?后加of: 介詞錯誤：out 是副詞，后面不能跟賓語，加個介詞就可以跟賓語了。第一篇：高考英語單句改錯200題(帶詳細解析)單句改錯(1) is a businessman who is always very busy that he has little time for his number of people who learns English as a foreign language is more than 750 the differences in spelling, written English is more or less the same in both British and American will get close to the nature and take exercise at the same should not go rafting if you know how to teacher told the students not to look out the many pages have you read? the Bronze Age, people could make tools from copper and ?s useless try to argue with five hours? drive, they reached where they thought was the place they?d been dreaming of.(2) great culture in the past had its own ideas of beauty expressing in art and is said that the weather will last hot for another three or four teacher wanted to speak to the student about her writing, he sent another student to tell her to his I entered the classroom, I saw some strangers seating at the ?t treat that the students do in their spare time as something ?m feeling much better now, so you mustn?t call the Yang became a teacher in 1986, he will been teaching for 20 years by boy is very afraid that his mother will scold traffic problem we are looking forward to seeing solve should attract the local government?s you don?t like that you don?t have to go skating.(3) ?s already am afraid there is not much time remaining for you to get dressed for the handed out my paper without checking carefully, so there were a lot of father agreed him to drive his car when he was only out from ten doctors say that this is good bring the old man a chair to warmly, and you?ll catch see the flu is spreading face of the danger, it is the most important to keep parents are wondering what it is what draws their so