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单词
class Bivalvia
释义
class Bivalvia
网络
双壳纲;双瓣纲;双枚贝纲
网络释义
1.
双壳纲
双壳纲
(
class Bivalvia
) 身体左右偏平,左右各有一个包被身体的外套膜和由它分泌的贝壳。头部退化,所以也称无头类。
www.baike.com
2.
双瓣纲
☆
双瓣纲
(
Class Bivalvia
)的牡蛎(oyster),牠就没有单眼。☆腹足纲(Class Gastropoda)的蜗牛(snails),有单眼,如图检视图片检 …
tw.knowledge.yahoo.com
3.
双枚贝纲
...ra)软体动物门(Phylum Mollusca)
双枚贝纲
(
Class bivalvia
)亦称双壳纲(因其体具有两片套膜及两片贝壳)或瓣鳃纲( …
blog.sina.com.cn
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更新时间:2026/4/30 6:47:37