列表比较松、杉、柏三科的区别复习课程.doc

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1、…………………………………………………………最新精品资料推荐……………………………………………………比较科目松杉柏球果的种鳞关系球果的种鳞与苞鳞离生半合生全合生种鳞与叶着生关系种鳞与叶为互生（螺旋状着生）互生（仅水杉对生）交互对生或轮生种鳞所含种子每个种鳞具2枚种子2------9枚2------9枚种子具有无翅种子具有翅种子具窄翅或无翅种子具窄翅或无翅有无气囊小孢子有或无气囊无气囊无气囊花药个数2个花药2------9个2------9个叶形叶条形或针形叶基不下延披针形、条形、钻形、鳞形叶基常下延鳞形或刺状叶习性常绿或落叶常绿或落叶常绿松科、

2、杉科和柏科的图片资料松科…………………………………………………………最新精品资料推荐……………………………………………………6…………………………………………………………最新精品资料推荐……………………………………………………杉科…………………………………………………………最新精品资料推荐……………………………………………………6…………………………………………………………最新精品资料推荐………………………………………………………………………………………………………………最新精品资料推荐……………………………………………………6……………………

3、……………………………………最新精品资料推荐……………………………………………………柏科…………………………………………………………最新精品资料推荐……………………………………………………6…………………………………………………………最新精品资料推荐……………………………………………………被动语态专项练习（上）一、选择题（2×15=30分） ()1._____anewlibrary_____inourschoollastyear?A.Is;builtB.Was;builtC.Does;buildD.Did;build()2.Anaccident

4、____onthisroadlastweek.A.hasbeenhappenedB.washappenedC.ishappenedD.happened()3.Cotton（棉花）____inthesoutheastofChina.A.isgrownB.aregrownC.growsD.grow…………………………………………………………最新精品资料推荐……………………………………………………6…………………………………………………………最新精品资料推荐……………………………………………………()4.Sofar,themoon____bymana

5、lready.A.isvisitedB.willbevisitedC.hasbeenvisitedD.wasvisited ()5.AtalkonChinesehistory_____intheschoolhallnextweek. A.isgivenB.hasbeengivenC.willbegivenD.gives ()6.Howmanytrees____thisyear? A.areplantedB.willplantC.havebeenplantedD.planted ()7.Alotofthings____bypeopletosave

6、thelittlegirlnow. A.aredoingB.arebeingdoneC.hasbeendoneD.willbedone ()8.--When___thiskindofcomputers______?--Lastyear. A.did;useB.was;usedC.is;usedD.are;used ()9.TheGreatWall____allovertheworld. A.knowsB.knewC.isknownD.wasknown ()10.Who_____thisbook_____? A.did;writtenB.was;

7、writtenbyC.did;writtenD.was;written ()11.Astory_____byGrannyyesterday. A.wastoldusB.wastoldtousC.istoldusD.toldus ()12.Themonkeywasseen_____offthetree. A.jumpB.jumpsC.jumpedD.tojump ()13.Theschoolbag___behindthechair. A.putsB.canbeputC.canbeputtedD.canput ()14.Olderpeople___

8、_well. A.looksafterB.mustbelookedafterC.mustlookafterD.lookedafter ()15.Our