次生构造中发达的栓内层称为( )。A.次生皮层B.初生皮层C.后生皮层D.绿皮层

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纤维次生壁外层有草酸钙结晶的称( )。A.韧皮纤维B.晶纤维C.晶鞘纤维D.嵌晶纤维

纤维次生壁外层有草酸钙结晶的称( )。A.韧皮纤维B.晶纤维C.晶鞘纤维D.嵌晶纤维

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172. This overcoat cost _______________. What’s mo

172. This overcoat cost _______________. What’s more, they are ___________ small

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10Polygonum multiflorum Thunb.的块根断面具有( )。A.星点B.层纹

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20. Charlie Chaplin was born in a poor area of Sou

20. Charlie Chaplin was born in a poor area of South London, but in 1913 he left

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