题目内容
（请给出正确答案）
A．They can easily catch fire.
B．They can be easily operated.
C．They are not as safe as gas balloons.
D．They cost too much money.
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更多“A．They can easily catch fire.B．They can be easily operated.C．They are not as safe as g”相关的问题
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A.A.They are cheaper than traditional newspapers.
B.B.They are very convenient to us
C.C.You can get more information from them quickly.
D.D.You can easily save information for future us
E.E.
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