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用显微镜观察洋葱表皮（如图），可看到排列得很整齐，连在一起的许多近似长方体的结构，每一个长方体就是一个细胞． （1）填出图中各标号的名称．①细胞壁；②______；③______；④______；⑤______；⑥细胞膜． （2）在植物细胞的结构中，起保护和支持作用的是______（填序号）． （3）动物细胞一般不具有的结构是______、______和______（填序号）． （4）切洋葱时，会有刺激性物质挥发出来，该物质存在于______内（填序号），其中的液体叫______．
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A.
fairly insightful.
B.
rather destructive.
C.
very illuminating.
D.
partially true.
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A.
metonymy
B.
metaphor
C.
antithesis
D.
sarcasm
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