商標使用的文字、圖形或者組合應當具備怎樣的特征?()。
C
暫無解析
設函數f(x)=ln(3x),則'f(2)=()
Theteamplayedhardbecausethechampionshipofthestatewas______.
Itisestimatedthat,currently,about50,000speciesbecome_____everyyear.
Hewassaid_____agiftfromher,knowingthatitmeantabribe.
1/(1+1/3)-1/(1+1/2)=?