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【判断题】
网络成瘾属于行为成瘾,一般是指因过度使用互联网而引起明显的社会、心理损害的一种现象( )A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】A/D转换器的精度是指与数字输出量所对应的模拟输入量的()与()之间的差值
【简答题】Many people wrongly believe that when people reach old age, their families place them in nursing homes.They are left in the 1 of strangers for the rest of their lives.Their 2 children visit them only ...
【单选题】A much more common problem with old people's health is ______.
A.
their fear of becoming old
B.
the illness
C.
old people's depression
D.
over-medication
【简答题】A．Retirement age. B．Old people's health. C．Keeping health. D．Old people's salary.
【单选题】用折射率为1.50的玻璃制成的屈光力为-4.00DS的平凹透镜,则该镜片凹面的曲率半 径为( )。
A.
100mm
B.
200mm
C.
500mm
D.
125mm
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