暗装或地埋的排水管道,在隐蔽前必须作水压试验。

1、正确
2、错误
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You____thatlettertoJames.However,youdidn't.

A、oughttowrite
B、oughttohavewritten
C、shouldwrite
D、shouldbewriting

Californiaisalandofvarietyandcontrast.Almosteverytypeofphysicallandfeature,sortofarcticicefieldsandtropicaljunglescanbefoundwithinitsborders.Sharplycontrastingtypesoflandoftenlieveryclosetooneanother.PeoplelivinginBakersfield,forinstance,canvisitthePacificOceanandthecoastalplain,thefertileSanJoaquinValley,thearidMojaveDesert,andthehighSierraNevada,allwithinaradiusofabout100miles.Inotherareasitispossibletogosnowskiinginthemorningandsurfingintheeveningofthesameday,withouthavingtotravellongdistance.ContrastaboundsinCalifornia.ThehighestpointintheUnitedStates(outsideAlaska)isinCalifornia,andsoisthelowestpoint(includingAlaska)。MountWhitney,14,494feetabovesealevel,isseparatedfromDeathValley,282feetbelowsealevel,byadistanceofonly100miles.Thetwoareashaveadifferenceinaltitudeofalmostthreemiles.Californiahasdeep,clearmountainlakeslikeLakeTahoe,thedeepestinthecountry,butitalsohasshallow,saltydesertlakes.IthasLakeTulainyo,12,020feetabovesealevel,andthelowestlakeinthecountry,theSaltonSea,236feetbelowsealevel.Someofitslakes,likeOwensLakeinDeathValley,arenotlakesatall:theyaredrieduplakebeds.Inadditiontomountains,lakes,valleys,deserts,andplateaus,CaliforniahasitsPacificcoastline,stretchinglongerthanthecoastlinesofOregonandWashingtoncombined.

1.WhichofthefollowingisthelowestpointintheUnitedStates?

A.LakeTulainyoB.MojavedesertC.DeathValleyD.TheSaltonSea

2.WhereisthehighestpointintheUnitedStateslocated?

A.LakeTahoe.

B.SierraNevada.C.MountWhitney.

D.Alaska.

3.HowfarawayisDeathValleyfromMountWhitney?

A.About3miles.

D.14,494feet.

4.WhichofthefollowingisNOTmentionedinthepassageasbeingwithinaradiusofabout100milesofBakersfield?

A.ThePacificOcean.

B.SanJoaquinValley.

C.MojaveDesert.

D.OregonandWashington.

5.WhichstatementbestdemonstratesthatCaliforniaisalandofvarietyandcontrast?

A.ThehighestlakeinCaliforniaisLakeTulainyo.

B.ItispossibletogosurfingandsnowskiinginsomepartsofCaliforniawithouthavingtotravellongdistance.

C.SierraNevada,SanJoaquinValley,MojaveDesertandthePacificOceanallliewithinaradiusofabout100miles.

D.OwensLake,inDeathValley,isnotreallyalakeatall.

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Thefanswereveryexcited______DavidBeckhamcametotheshow.

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