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Discusswithyourclassmateswhetherthereareanyproblemsinthefollowingmemoandhowyoucanimprovethem.Thencontrastyourimprovedmemoandwittheoriginalones.To:DavidSmithForm:LucyBurwellDate:January10,2013Subject:DecoratingthereceptionroomThedecorationofthereceptionroomissoterriblethatwehavetochangeitimmediately.Howcanyoudecorateitlikethat!Thinkaboutthefunctionofthereceptionroom,OK?Bytheway,thesitesofthenewwashingroomonthethirdfloorandtheofficeforsalesmanageralsoneedtobeconsidered.

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下列不属于胎膜的是

A. 尿囊
B. 蜕膜

体节共有（）

A. 42~44对

.正常足月分娩时羊水有（）

A. 500~1000ml
B. 1500~2000ml
C. 2000~2500ml

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A. 30cm
B. 40cm
C. 50cm