从编制的频数表可以看到,频数分布的重要特征有
A.集中趋势B.离散趋势C.集中趋势和离散趋势D.正态趋势E.对称趋势
参考答案:C
--- -Your mobile phone is quite nice. Where did you buy __________ ?
---- In Shenzhen .Do you want to have _______ like this?
A.it , it
B.one , one
C.one , it
D.it , one
女孩,5岁,两岁发现内斜视。检查:视力:右0.3,左0.1,眼位:左眼+15°,眼球运动:各方向均不受限,眼底像清晰未发现明显异常,同视机检查不合作,睫状肌麻痹下验光结果为中度远视。下一步的处理应做()
A.门诊观察
B.配戴全屈光矫正眼镜
C.戴低矫眼镜
D.戴减去总屈光量1/3的眼镜