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【单选题】
视网膜中央凹处对光感受分辨力高的主要原因是( )(2009年)A.
感光细胞密度大
B.
感光细胞兴奋性高
C.
感光细胞中感光色素含量高
D.
传入通路的会聚程度小
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A.
performance of your company in finance
B.
history and development of your company
C.
structure on management in your company
D.
beautiful buildings in your company
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A.
to write; is
B.
writing; was
C.
write; is
D.
wrote; was
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A.
I enjoyed visiting your company
B.
It’s terrible for me to visit your company
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