单选题
It can be inferred from the passage that lighthouses in the Northeast did NOT need high towers because ______.
A、
ships there had high masts
B、
coastal waters were safe
C、
the coast was straight and unobstructed
D、
the lighthouses were built on high places
【正确答案】
D
【答案解析】
[解析] 第二段第三句可知，东北海岸的灯塔一般都建在高处，因此灯塔本身并不高。
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