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【简答题】
棍,棒;树枝 v.插入;使粘着
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【单选题】To keep the aircraft from moving while it is on the jack， the wheels that are not jacked should be securely ____________.
A.
blocked
B.
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C.
chocked
D.
stopped
【简答题】Patricia Blues, 29, has a new aim in life: to keep drivers' hands on their steering wheels and off their cell phones. On November 2, 2007, Blues lived through a horrible experience. A motorist dialing...
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