How any fetus survives gestation has baffled scientists for decades: the embryo’

游客2025-02-22 33

问题 How any fetus survives gestation has baffled scientists for decades: the embryo’s tissues are half foreign and yet, unlike______organ transplant, it isn’t normally rejected.

选项 A、an adaptive
B、a mismatched
C、a successful
D、an obdurate
E、a preplanned

答案 B

解析

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How any fetus survives gestation has baffled scientists for decades: the embryo’

Inthetwodecadesbetween1910and1930,overtenpercenttotheBlackpopu

Inthetwodecadesbetween1910and1930,overtenpercenttotheBlackpopu

Untilrecently,scientistsdidnotknowofaclosevertebrateanaloguetoth

Untilrecently,scientistsdidnotknowofaclosevertebrateanaloguetoth

Untilrecently,scientistsdidnotknowofaclosevertebrateanaloguetoth

Untilrecently,scientistsdidnotknowofaclosevertebrateanaloguetoth

Untilrecently,scientistsdidnotknowofaclosevertebrateanaloguetoth

Somesoilscientistshaveassertedthatdecayingmatterontheforestfloorisa

Naturalist:Fordecadeswehaveknownthatthetuatara,aNewZealandreptile,h

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