【单选题】In emergency, the SART should be activated and installed as high as possible
A.
after being taken out from the container
C.
before being get out from the container
D.
after being put into water
【单选题】You _____ park here! It's an emergency exit. [ ]
【简答题】给出下列四个命题:①在空间,若四点不共面,则每三个点一定不共线;②已知命题 ,“非 为假命题”是“ 或 是真命题”的必要不充分条件;③若 ,那么 ;④若奇函数 对于定义域内任意 都有 ,则 为周期函数。其中错误命题的序号为____________.
【单选题】Why were the emergency services NOT able to manage the situation?
A.
There weren't enough people.
B.
The fire was too enormous.
C.
The planes didn't carry enough water-bombs.
D.
There was no help from other countries.
【简答题】下列命题: 其中正确命题的序号有_____________
【简答题】有下列四个命题: ①命题“若 ,则 互为倒数”的逆命题 ②命题“面积相等的三角形全等”的否命题 ③命题“ ,则方程 ”有实根的逆否命题 ④命题“若 ,则 ” 的逆否命题 其中是真命题的是 (填上你认为正确的命题的序号)
【单选题】—Do you know emergency ( 紧急 ) telephone numbers? —Yes. For example, ____ fire, we can call 119.
【单选题】已知命题p: ,且a>0,有 ,命题q: , ,则下列判断正确的是