血燥生风的病因是
A．产后恶露日久不净B．久病耗血或年老精亏C．生血不足或失血过多D．热病后期，阴津亏损E．水不涵木，浮阳不潜
参考答案：B
认真读一读，给下面的句子排序。
( ) You can wash your hands in the bathroom.
( ) Oh! You have jam on your hands.
( ) This is the bathroom.
( ) Help, Jenny! My hands are dirty.
( ) Here is the sink.
质量为m=2Kg的物体在粗糙水平地面上滑行，其动能与位移的关系如图所示，则物体与地面间的滑动摩擦系数μ为______，滑行时间为______．
