若，则dy等于______。 A． B． C．exdx D．exlnxdx

Heisquitethoughtless,forveryseldomcanhe______otherpeople'stroubles.

种群增长率的大小是由出生率和死亡率决定的。

Ihearmanyparentscomplainingthattheirteenagechildrenarerebelling.Iwishitwereso.Atyourageyououghttobegrowingawayfromyourparents.Youshouldbelearningtostandonyourowntwofeet.Buttakeagoodlookatthepresentrebellion.Itseemsthatteenagersarealltakingthesamewayofshowingthattheydisagreewiththeirparents.Insteadofstrikingoutboldlyontheirown,mostofthemareclutchingat(attemptingtoseize)oneanother'shandsforreassurance.Theyclaimtheywanttodressastheyplease.Buttheyallwearthesameclothes.Theysetoffinnewdirectionsinmusic.Butsomehowtheyallendupcrowdedroundlisteningtothesamerecord.Theirreasonforthinkingoractinginthus—and—suchawayisthatthecrowdisdoingit.Theyhavecomeoutoftheircocoons(蚕茧)intoalargercocoon.Ithasbecomeharderandharderforateenagertostandupagainstthepopularitywaveandtogohisorherownway.Industryhasfirmlycarvedoutateenagemarket.Thesedayseveryteenagercanlearnfromtheadvertisementswhatateenagershouldhaveandbe.Andmanyoftoday'sparentshavecometowardhighmarksforthepopularityoftheirchildren.Allthisaddsuptoagreatbarrierfortheteenagerwhowantstofindhisorherownpath.Butthebarrierisworthclimbingover.Thepathisworthfollowing.Youmaywanttolistentoclassicalmusicinsteadofgoingtoaparty.Youmaywanttocollectrockswheneveryoneelseiscollectingrecords.Youmayhavesomethoughtsthatyoudon'tcaretoshareatoncewithyourclassmates.Well,gotoit.Findyourself.Beyourself.Popularitywillcome—withthepeoplewhorespectyouforwhoyouare.That'stheonlykindofpopularitythatreallycounts.

“可惜流年，忧愁风雨，树犹如此”出自______

一般来讲，土壤的质地可分为沙土、黏土和______3大类。

Hardly(hehad)entered(theoffice)whenherealized(thathehad)(forgotten)hiswallet.

Oneofthethingsshe(wrote)(about)(were)lifeonasmallfarmatthe(beginning)ofthecentury.

下列属于所有权继受取得的是______

Naturalfoods,forexample,arevegetables,fruitandgrainwhichhavebeengrowninsoilthatisrichinorganic(有机的)matter.(Passage3)

Wheneverwe(hearof)anaturaldisaster,(even)inadistantpartoftheworld,wefeel(sympathy)forthepeople(havingaffected).

Thisisthemostimportantrespect(which)civilized(man)canbedistinguished(from)primitivec(ommunities).

(Stayingup)allnight,Tom(finishednotonly)thehomework(butalsoread)manypoemsofhis(favorite)poets.

行为作为民事法律关系产生、变更以及消灭的原因______。

在下列哪种情况下，可使心排出量增加______

Wedecidedtoleavethewaitressabig______becauseherservicewasexcellent.

Youcannotbe______carefulwhenyoudriveacar.

Hewenttothelibrary(and)spentthewholeafternoonthere(tolook)for(material)foranarticle(on)Shakespeare.