【单选题】在一定抽样平均误差的条件下,要提高推断的可靠性,必须( )。
【判断题】本次实验用热电阻测量温度时,需测量并记录环境温度。
【单选题】患者,男性,20岁,外伤后尿道滴血,并有排尿困难。体查:腹平软,腹部压痛、反跳痛不明显,会阴部、阴囊、阴茎部明显肿胀。首先考虑是()
【判断题】在一定的抽样平均误差条件下,扩大极限误差范围,可以提高推断的可靠程度。
【单选题】公路平面缓和曲线通常采用回旋曲线,其原因是( )
【单选题】Lots o f people can speak more than o ne language. My besf friend, _________, can speak English and Spanish.
【单选题】Which one of following statement is wrong?( )
A.
In western countries, drivers can speak on the mobile phone while driving.
B.
In western countries, when pedestrians are walking on zebra crossing, cars must stop.
C.
In western countries, you should chew with mouth closed.
D.
In western countries, before taking more food, you should finish what you have in your mouth.