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【单选题】
能产生基质和纤维的细胞是A.
巨噬细胞
B.
肥大细胞
C.
浆细胞
D.
成纤维细胞
E.
脂肪细胞
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反馈参考答案：
举一反三
【单选题】最可能形成z-DNA的序列是( )。
A.
5’-ATATATATATATATATATAT-3’ 3"一TATATATATATATATATATA-5’
B.
5’-AAAAAAAAAAAAAAAAAAAA-3’ 3"-TTTTTTTTTTTTTTTTTTTT-5’
C.
5’-GCGCG(2GCGCGCCGCGCGCG一3’ 3"-CGCGCGCGCGCGCGCGCGCG-5’
D.
5’-GGGGGGGGGGGGGGGGGGGG一3’ 3"-CCCCCCCCCCCCCCCCCCCCC一5’
【单选题】Progress so far has been very good . _______ ,we are sure that the project will be completed on time.
A.
However
B.
Otherwise
C.
Besides
D.
Therefore
【单选题】Progress so far has been very good. ______ , we are sure that the project will he completed on time.
A.
However
B.
Otherwise
C.
Therefore
D.
Besides
【简答题】维持子宫前倾的主要韧带为
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