【单选题】下列数据中有效数字的位数为 4 位的是( )
B.
[OH-] =3.005×10 -3 mol•L-1
【单选题】下列各数据中,有效数字位数为四位的是()
【单选题】在下列数据中,两位有效数字的是( )
A.
)0.140;(3)1.40;(3)K a =1.40×10 -4 ;(4)pH=1.40
【单选题】Whats the reason unhappy incidents happening in the Olympic Games?
A.
Sport is competitive rather than for the love of the game.
B.
Some people don't abide by the rules.
C.
Misunderstanding and hatred.
D.
Too much patriotism was stressed in the incident.
【简答题】A.issues B.s C.situations D.incidents
【简答题】The Incidents of Rosa Parks
【单选题】下列数据中为四位有效数字的是( )
A.
)0.068;(2)0.06068;(3)0.6008;(4)0.680