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【参考答案】
B
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单项选择题
According to the author, the most active advocates of telecities are______.
A.leaders and planners
B.urban architects
C.some corporations
D.government administrators
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单项选择题
Judging from the context, the word they (Line 2, Para. 4) refers to______.
A.the security risks
B.the terrorist attacks
C.environmental hazards of over-centralization
D.the security risks, economic expenses, and environmental hazards
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E
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F
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