单项选择题

In industrialized countries, what businesses are scarcely affected by climate change

A．Water systems.
B．Energy and property.
C．Services.
D．Coastal activities.
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Which of the following activities must consider climate as an important factor
A．Microelectronics.
B．Communications.
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This passage is mainly about ______.
A．living mechanisms and their artificial imitations
B．the remarkable sonar system of bats
C．the deficiencies of man-made sonars
D．the experiment of "blind-bats"
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