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如图1所示，平静的泳池水面上漂浮着一只小皮球，多多打算用扔石子荡起水波的方法将皮球推向泳池边．但他发现小石子扔进水中，激起了一圈圈水波向外扩展，而皮球几乎只在原处“蹦蹦跳跳”，并未随水波向外水平移动...
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如图6所示一只未点燃的蜡烛的下端插入一根小铁钉使蜡烛能直立漂浮在水面上露出长度为L当把蜡烛水面以上部
还会重新露出水面，露出的长度等于L
不会重新露出水面
还会重新露出水面，露出的长度大于L
还会重新露出水面，露出的长度小于L
如图所示一木块漂浮在水面上静止请画出木块的受力示意图
如图8所示将两只同样盛满水的溢水杯放在天平的两盘时天平平衡将一木块放在右盘的溢水杯中木块漂浮在水面上
右边上移
保持平衡
右边下移
无法确定
晶晶帮妈妈洗碗时发现同一只瓷碗既可以漂浮在水面上也可以沉入水底如图ZX2－1所示下列说法正确的是图Z
瓷碗能漂浮在水面上，说明陶瓷的密度比水小
瓷碗漂浮在水面上时，所受浮力等于其受到的重力
当漂浮的瓷碗沉入水底后，水对盆底的压力变大
当漂浮的瓷碗沉入水底后，水对盆底的压强不变
如图14所示乒乓球漂浮在水面上请画出乒乓球受力的示意图
重6N的一只皮球在空中飞行的路线如图23所示请你在该图中画出皮球所受重力的示意图
如图8所示重为8牛的物体漂浮在水面上请用力的图示法画出物体所受的浮力
用天平测量某木块的质量示数如图所示则该木块的质量为g.当木块漂浮在水面上时所受到的浮力为N..
如图9所示一只木盆静止浮在水面上现用手将它慢慢向下按在盆未全部进入水中之前手用的力逐渐选填增大不变或
为了测量某石块的密度实验中学物理兴趣活动小组的同学利用一只小玻璃杯一个量筒和适量的水做了如下实验1在
如图7所示一只未点燃的蜡烛下端插入一根小铁钉使蜡烛能直立漂浮在水面上露出长度为L.当把蜡烛水面以上部
还会重新露出水面
不会重新露出水面
以上两种可能都有
无法判断是否会重新露出水面
如图所示一只未点燃的蜡烛的下端插入一根小铁钉使蜡烛能直立漂浮在水面上露出长度为L当把蜡烛水面以上部分
还会有一部分重新露出水面而漂浮
不会重新露出水面，在水中悬浮
不会重新露出水面，在水中下沉
无法判断是漂浮．悬浮．下沉
一只未点燃的蜡烛的下面插入一根小铁钉使蜡烛能直立漂浮在水面上露出长度为L.如图所示当把蜡烛水面以上部
不会重新露出水面
还会重新露出水面
以上两种可能都有
无法判断
一个500g的皮球漂浮在静止的水面上请在图中画出皮球所受浮力的图示
a.图1是漂浮在水面上的足球请画出足球受到的浮力的示意图b.如图2所示一束光AO从空气中入射到水面上
漂浮在水面上的皮球用手将其慢慢压入水中的过程中皮球受到的浮力将＿＿＿＿施加的压力将＿＿＿＿＿＿选填变
如图13所示一束光斜射到平静的水面上同时发生反射和折射请在图中画出反射光线和折射光线
如图所示一只未点燃的蜡烛的下端插入一根小铁钉使蜡烛能直立漂浮在水面上露出长度为L.当把蜡烛水面以上部
还会重新露出水面
不会重新露出水面
以上两种可能都有
无法判断是否会重新露出水面
如图8－1－14所示两只纸船浮在水面上静止不动用大注射器向两船之间的水面快速注水两船将
向中间靠拢
静止不动
向两侧分开
向同侧偏移
图8－1－14
一只未点燃的蜡烛的下面插入一根小铁钉使蜡烛能直立漂浮在水面上露出长度为L.如图所示当把蜡烛水面以上部
不会重新露出水面
还会重新露出水面
以上两种可能都有
无法判断
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Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeopleareanxiousandself﹣consciousthatistheyareconcernedwiththeirownappearanceandactionstoomuch.NegativethoughtsareconstantlyoccurringintheirmindsWhatkindofimpressionamImaking?Dotheylikeme?DoIsoundstupid?AmIwearingunattractiveclothes? Itisobviousthatsuchuncomfortablefeelingsmustaffectpeopleunfavorably.Aperson'sself﹣conceptisreflectedinthewayheorshebehavesandthewayapersonbehavesaffectsotherpeople'sreactions.Ingeneralthewaypeoplethinkaboutthemselveshasadeepeffectonallareasoftheirlives. Shypeoplewhohavelowrespectarelikelytobepassiveandeasilyinfluencedbyothers.Theyneedfaiththattheyaredoingtherightthing.Shypeopleareverysensitivetocriticism.Itmakesthemfeelinferior自卑.Theyalsofinditdifficulttobepleasedbypraisesbecausetheybelievetheyareunworthyofpraise.AshypersonmayrespondtoapraisewithastatementlikethisoneYou'rejustsayingthattomakemefeelgoodIknowit'snottrue.Itisclearthatwhileself﹣awarenessisahealthyqualityoverdoingitisharmful. Canshynessbecompletelygotridoforatleastreduced?Fortunatelypeoplecanovercomeshynesswithdeterminationsinceshynessgoeshandinhandwithlackofselfrespect.Itisimportantforpeopletoaccepttheirweaknessaswellastheirstrengths.Eachoneofushashisorherowncharacteristics.Weareinterestedinourownpersonalways.Thebetterweunderstandourselvestheeasieritbecomestoliveuptoourchancesforarichandsuccessfullife. 1Thefirstparagraphismainlyabout. A.thecauseofshyness B.theeffectofshynessonpeople C.thefeelingsofshypeople D.thequestionsinthemindsofshypeople 2Accordingtothewriterself﹣awarenessis. A.harmfultopeople B.aweakpointofshypeople C.thecauseofunhappiness D.ahealthyquality 3Whatistheshypeople'sreactiontopraise? A.Theyarepleasedbyit. B.Theyfeelitisnottrue. C.Theyareverysensitivetoit. D.Theyfeeltheyareworthyofit. 4Wecanlearnfromthepassagethatshynesscan. A.beovercomewithdetermination B.helpustoliveuptoourfulldevelopment C.enableustounderstandourselvesbetter D.havenothingtodowithlackofselfrespect
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