【单选题】A sling psychrometer is a/an ____.
B.
instrument used in celestial navigation
C.
instrument used to measure relative humidity
D.
instrument used to measure specific gravity
【简答题】已知x是奇函数,当x<0时f(x)=x(x+2),则当x>0时,f(x)=______.
【单选题】Among the uses not mentioned in the article is the use of the bandanna as a ______.
【简答题】当x=______时,14-x=0;当x=______时,x+2.8=5.
【简答题】若f(x)为偶函数,当x>0时,f(x)=x,则当x<0时,f(x)=( )。
【简答题】在○里填上“<”、“>”或“=”. (1)当X=88时,X+14○74;(2)当X=7时,15X○105; (3)当X=0.2时,X÷10○0.2;(4)当X=7.5时,12-X○1.5.
【单选题】I am ready to receive you.I will use rescue sling
A.
The vessel is to use rescue basket
B.
The vessel is to use rescue sling
C.
The vessel is to use rescue net
D.
The vessel is to use rescue litter
【简答题】简述物联网的定义,分析物联网的“物”的条件?