儿童注意力缺陷多动障碍诊断年龄为（）
A.1岁前
B.2岁前
C.3岁前
D.4岁前
E.6岁后
参考答案：E
38. She is crazy _____ the film star, while her brother is crazy _____ surfing.
A．to; for
B．on; to
C．for; at
D．for; on
A．副线圈中电压表的读数为55V
B．副线圈中输出交流电的周期为0.01s
C．原线圈中电流表的读数为0.5A
D．原线圈中的输入功率为110W
W