Everyoneknowsthatchickenslayeggs(产卵).Mostpeopleknowthatalltheotherbirdsdoaswell.Buthaveyoueverthoughtaboutotheranimalsthatlayeggs?Theyincludebees,snakesandsomeseaanimals.Whenamotherlayseggs,manymorebabiescanbebornatonce,orinafewdays,becausethereisverylittledevelopmentinsidetheparent.Animalsthatdonotlayeggsoftenhavefewerbabies.Animalslaymanyeggsbecauseotheranimalsmayeatthebabies.However,eventhoughsomeoftheirbabiesareeaten,theywillstillhavesomemoretocontinuetheirfamily. Someanimalsthatlayeggsdonottakecareoftheiryoung.Turtlescomeontothebeachanddigholes.Thentheyputtheireggsinthesandandleave.Aturtlemothercanlayasmanyas150eggs.Whenthebabiescomeoutoftheeggs,theymustfindtheirownwaytotheocean.Theymustlearnhowtoliveontheirown.Manyyoungturtlesgeteatenbyotheranimals. Mosteggshaveanoutsideshellthatkeepsthegrowinganimalinsidesafe.Theeggshell alsokeepstheyounganimalfromdryingout.Aftertheanimalisfullydeveloped,itcomesoutoftheegg. Theanimalgrowsbiggerandbigger.Thenitcanhaveitsownyoung. 小题1:Whydoanimalslaymanyeggs? |
A.Becauseotheranimalsmayeattheirbabies. |
B.Becausetheyusetheireggsforfood. |
C.Becausetheywanttohavefewerbabies. |
D.Becausetheywanttoeattheirbabies. |
小题2:Whatdoweknowaboutturtles?
A.Theydon’tlookaftertheirbabies. |
B.Babyturtleshatetheirmother. |
C.Otheranimalscan’teatturtlebabies |
D.Turtlebabiescan’ttakecareofthemselves. |
小题3:Eggshellscanbeusedto______.
A.makeeggsmorebeautiful |
B.makeeggsmoretasty |
C.lettheyounganimalsdry |
D.protecttheyounganimals |
小题4:Thepassageisprobablyfrom___________.
A.anewspaper | B.asciencebook |
C.asportsmagazine | D.astorybook |