单项选择题

8. Th细胞活化的标志是表达（）。A.
IL-1R B.
IL-2R C.
TNFR D.
IFN-γR E.
IL-3R

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现实社会有大量的数据唾手可得，其中的大部分数据都十分有用，但前提是人们有能力从中提取出（）的内容。

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Which description is wrong about the amorphous matrix of connective tissue?

A．It is an amorphous jelly composed of hydrated biological macromolecules.
B．It is composed of proteoglycans and tissue fluids.
C．Proteoglycans include proteins and glycosaminoglycans.
D．The proteoglycan polymer forms a microporous sieve structure called molecular sieve.