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【单选题】
扫描电子显微镜可用于:A.
获得细胞不同切面的图象
B.
观察活细胞
C.
定量分析细胞中的化学成分
D.
观察细胞表面的立体形貌
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A.
This is in large due to its broadly based tax structure．
B.
New Mexic0’S extractive mineral industries contribute about a third of the state’S $1．9 billion general-fund income in fiscal year l 991．
C.
However．the extractive mineral industry in New Mexico is one of the state’S strongest economic forces．
D.
During fiscal year l 992 New Mexico raised permanent funds worth about$6．1billion．
E.
The combined value of oil and gas production was$2．8 billion．
F.
Some 16，000 employees work in the extractive industries and their wages are among the highest of any major industry．
G.
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