单项选择题

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A.Neglect the problems and pay chief attention to its benefits.
B.Make improvements to the system.
C.Abandon the system and build a new one.
D.Introduce a better system from the United States.
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单项选择题
A.She has not bought him a gift yet.B.She bought him a book.C.She bought him a case for his coin collection.D.She bought him a watch.
A.She has not bought him a gift yet.
B.She bought him a book.
C.She bought him a case for his coin collection.
D.She bought him a watch.
单项选择题
A.It breaks down at times.B.The alarms sometimes do not sound.C.There are a lot of false alarms for small quakes.D.The computer controlling the system gives wrong orders occasionally.
A.It breaks down at times.
B.The alarms sometimes do not sound.
C.There are a lot of false alarms for small quakes.
D.The computer controlling the system gives wrong orders occasionally.
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