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She was a person who liked to chat, and since her ______, it had become much quieter.
A、 depart
B、 departure
C、 arrive
D、 arrival

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无序列表的HTML代码是
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社会调查研究有何社会功能?
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It is a terrible illustration of man &39; s weakness to nature ,and the tsunami(海 啸) that struck the Japanese coast in March, 2011 has illustrated the difficulty of fighting against natural disasters, even for a prosperous nation.
Totally preventing tsunami-damage is impossiblE.But there is much that can be done to minimize damage and loss of lifE.Measures that can be taken include designing solid buildings, and developing early-waming systems, public education programs and evacuation(疏散) strategies. Moreover, the approach of a tsunami is possibly picked up by the sensors of complicated international waming systems. Countries can use radio and television broadcasts as well as loudspeaker networks to warn the publiC.
But an early waming system depends on how far the tsunami strikes, if it&39; s close by, the warning system is not going to be very effectivE.When people are faced with an unstoppable force like a tsunami the massive waves created by events like underwater earthquakes, the best course of action for them is to get inland and to the higher ground as quickly as possiblE.
51. The first paragraph tells us that________
A.man can easily defeat the nature
B.tsunamis take place only in Japan
C.man’ s ability to cope with natural disasters is limited
D.the tsunami-damage in Japan is not so terrible
To prevent tsunami-damage, the following measures can be taken EXCEPT________A.designing firm buildings
B.developing early-warning systems
C.developing evacuation strategies
D.keeping the public unaware of the seriousness of tsunamis
When a tsunami happens, the best course of action for people is to________A.listen to radio and television broadcasts for information
B.get inland and to the higer ground as quickly as possible
C.stay where they are
D.rely on the warning systems
According to the passage , which of the folloiwing can cause a tsunami ?A.Storms
B.Massive waves
C.Underwater earthquakes
D.Floods
Which of the following statements is correct according to che passage?A.The total prevention of tsunamis is possible
B.Rich countries are less affected by tsunamis than poor countries
C.Approaching tsunamis can possibly be picked up by sensors
D.An early warning system is effective when a tsunami is close by
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