7.-Would you be able to go to the party ?
- .
A.I don’t expect B.I’m afraid not
C.I don’t think so D.I believe not
6. (-Excuse me, have you got a light?
- . I don’t smoke.
A.Don’t mention it B.Never mind C.I’m afraid not D.Thanks a lot
5.-I’m going to travel to America. Would you consider telling me about your experiences there?
-______. Let’s discuss it over dinner.
A. That’s all right B. By all means C. Go ahead D. It just depends
4. -I don’t feel like going out. Why don’t we just stay home and watch TV instead?
-_______ You promised to take me out for dinner and to the theatre on my birthday.
A. Great! B. Why me? C. Come on! D. Not at all.
3.-Was it two months ago ___ you luckily got an opportunity to spend your holidays in Spain?
-______. John was the lucky dog.
A. when, Not I B. when, Not really C. that, Not me D. that, Yes
2.-I’m afraid I can’t go to your party, I have lots of things to do.
-__________!
A. What a pity B. With pleasure C. No problem D. Mind yourself
1. -We really enjoy ourselves at the party. Thanks again,Mr. and Mrs. White.
-_______. Just drop in whenever you feel like it.
A. Our great honour B. Nice having you here
C. Nice you are here. D. With pleasure
5.突出向量與其它數(shù)學(xué)知識(shí)的交匯
“新課程增加了新的現(xiàn)代數(shù)學(xué)內(nèi)容,其意義不僅在于數(shù)學(xué)內(nèi)容的更新,更重要的是引入新的思維方法,可以更有效地處理和解決數(shù)學(xué)問(wèn)題和實(shí)際應(yīng)用問(wèn)題”。因此,新課程卷中有些問(wèn)題屬于新教材與舊教材的結(jié)合部,凡涉及此類(lèi)問(wèn)題,高考命題都采用了新舊結(jié)合,以新帶舊或以新方法解決的方法進(jìn)行處理,從中啟示我們?cè)诟呖紝W(xué)習(xí)中,應(yīng)突出向量的工具性,注重向量與其它知識(shí)的交匯與融合,但不宜“深挖洞”。我們可以預(yù)測(cè)近兩年向量高考題的難度不會(huì)也不應(yīng)該上升到壓軸題的水平.
4.注重?cái)?shù)學(xué)思想方法的教學(xué)
①.?dāng)?shù)形結(jié)合的思想方法。
由于向量本身具有代數(shù)形式和幾何形式雙重身份,所以在向量知識(shí)的整個(gè)學(xué)習(xí)過(guò)程中,都體現(xiàn)了數(shù)形結(jié)合的思想方法,在解決問(wèn)題過(guò)程中要形成見(jiàn)數(shù)思形、以形助數(shù)的思維習(xí)慣,以加深理解知識(shí)要點(diǎn),增強(qiáng)應(yīng)用意識(shí)。
②.化歸轉(zhuǎn)化的思想方法。
向量的夾角、平行、垂直等關(guān)系的研究均可化歸為對(duì)應(yīng)向量或向量坐標(biāo)的運(yùn)算問(wèn)題;三角形形狀的判定可化歸為相應(yīng)向量的數(shù)量積問(wèn)題;向量的數(shù)量積公式,溝通了向量與實(shí)數(shù)間的轉(zhuǎn)化關(guān)系;一些實(shí)際問(wèn)題也可以運(yùn)用向量知識(shí)去解決。
③.分類(lèi)討論的思想方法。
如向量可分為共線向量與不共線向量;平行向量(共線向量)可分為同向向量和反向向量;向量在方向上的投影隨著它們之間的夾角的不同,有正數(shù)、負(fù)數(shù)和零三種情形;定比分點(diǎn)公式中的隨分點(diǎn)P的位置不同,可以大于零,也可以小于零。
3.向量知識(shí),向量觀點(diǎn)在數(shù)學(xué).物理等學(xué)科的很多分支有著廣泛的應(yīng)用,而它具有代數(shù)形式和幾何形式的“雙重身份”能融數(shù)形于一體,能與中學(xué)數(shù)學(xué)教學(xué)內(nèi)容的許多主干知識(shí)綜合,形成知識(shí)交匯點(diǎn),所以高考中應(yīng)引起足夠的重視. 數(shù)量積的主要應(yīng)用:①求模長(zhǎng);②求夾角;③判垂直;
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