f(v)是麦克斯韦速率分布函数,则表示的是()。
A.方均根速率
B.最可几速率
C.算术平均速率
D.速率和
参考答案:C
函数f(x)=(x-1)2-1,x∈{-1,0,1,2,3}的值域是________.
根据句意,用括号内所给单词的适当形式填空。
小题1:---How is your business going?
--- It couldn’t be _______ (bad).
小题2:Each of us _______ (breath) heavily after running on the playground every morning.
小题3:For everyone’s _______ (safe), we should always remember the law against driving after drinking.
小题4:Such a camera can help spacemen film _______ (they) during the flight.