【单选题】The population of the country is 3 million, _____ Kooris.
A.
1 % of which were made up of
C.
and 1 % of which were made up of
【简答题】在下图所示的电路中,UCC=12V,RC=3KΩ,β=50,UBE可忽略,若使UCE=6V,则RB应为( )KΩ。
【单选题】型砂受高温作用后冷却至室温所具有的抗压强度称为
【判断题】水准尺红面尺底自0.OOOm起算。( )
【多选题】我国专利法中的讲的“发明创造”是指()。