【单选题】患者,女性,60岁,因肺心病发生II型呼衰急诊入院,急诊室已给予输液、吸氧,现准备用平车将其送入病房,护送途中护士应注意
【判断题】相对于平面图来说,在表示陈设物品位置方面,草图具有更加准确的效果。
【简答题】如图所示,在正方体ABCD-A 1 B 1 C 1 D 1 中,求异面直线A 1 B 与AC 1 所成的角.
【单选题】如图所示,长方体ABCD-A1B1C1D1中,底面A1B1C1D1是边长为1的正方形,高CC1= ,则直线AC1与底面ABCD所成的角的大小是( )
【简答题】如图所示,在正方体ABCD-A 1 B 1 C 1 D 1 中,异面直线AC与B 1 C 1 所成 的角等于____ .
【单选题】The author states that one important reason that we do not talk much about poverty is that ______.
A.
no one knows what to do about it
B.
poverty really is lower than in the past
C.
no one has been left out of the current boom
D.
the president is not concerned about the poor
【简答题】One of the few things you __ _ say about English people with certainty is that they talk a lot about the weather. A.need B.must C.should D.can
【单选题】圆柱形车轮踏面与平顶钢轨的接触是( )。
【单选题】关于钢轨轨顶叙述正确是( )。
C.
圆柱形或圆锥形踏面的车轮与凸顶钢轨接触为线接触。
【简答题】如图所示,在正方体ABCD-A 1 B 1 C 1 D 1 中,AB=a,E为棱A 1 D 1 中点. (I)求二面角E-AC-B的正切值; (II)求直线A 1 C 1 到平面EAC的距离.