单选题半数以上注意力缺陷多动障碍儿童的起病年龄是（）A＜1岁B＜2岁C＜3岁D＜4岁E＞10岁
单选题
半数以上注意力缺陷多动障碍儿童的起病年龄是（）
A
＜1岁
B
＜2岁
C
＜3岁
D
＜4岁
E
＞10岁
参考解析
解析：
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