groggy
发表于 2025-3-26 21:57:49
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轻推
发表于 2025-3-27 04:36:54
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Insensate
发表于 2025-3-27 08:39:18
The Mollusca,on, a fold of the body wall (mantle) outside which is usually a hard external shell. Inside this the whole animal can be withdrawn. Most of the fresh-water forms are reasonably large so that their habits can be studied in a laboratory or classroom without the aid of a microscope; many species live w
制造
发表于 2025-3-27 10:21:00
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SMART
发表于 2025-3-27 16:42:36
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Obvious
发表于 2025-3-27 19:52:25
The Protozoa,(i.e. one . and the . under its control) are Protozoa. It is difficult, however, to give a simple definition which describes all the forms which are contained in the group for two reasons. First, because there are some members with complicated bodies and several nuclei; these, however, are not truly
altruism
发表于 2025-3-28 01:03:40
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Hiatus
发表于 2025-3-28 03:10:04
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简洁
发表于 2025-3-28 07:18:11
Aleksandra Milošković,Nataša Kojadinović. The pond sponge is found in still water only. It has a similar encrusting habit, and is characterized by a large number of finger-shaped projections on its surface (Fig. 1). It is generally a brighter green than the river sponge and it has a coarser texture.
Inflamed
发表于 2025-3-28 12:35:01
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