题目：
Which statement is TRUE when comparing cold and warm fronts?（）
A.Cold fronts are more violent and of shorter duration
B.Cold fronts are milder and last longer
C.They are very similar with the exception of wind direction
D.Warm fronts are more violent and of longer duration
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
