单项选择题

The significance of the slow speed of tsunamis is that people may ______.

A．notice them out at sea
B．find ways to stop them
C．be warned early enough
D．develop warning systems
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单项选择题
The United Nations' experts are supposed to ______.
A．construct strong buildings
B．put forward proposals
C．detect disastrous earthquakes
D．monitor earthquakes
单项选择题
The destruction of Agadir is an example of ______.
A．faulty building construction
B．an earthquake's strength
C．widespread panic in earthquakes
D．ineffective instruments
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