【简答题】A. concerned B. stock C. come up with D. everyone E. economics F. global G. hand H. collapsed I. avoided J. show The (1) finacial cr ,brewing for a ...
【单选题】What is the passage mainly about?
A.
Two serious problems our Earth is facing.
B.
Water shortage is a serious problem.
C.
Overpopulation is an urgent problem for governments.
D.
How we should deal with pollution on Earth.
【单选题】电感元件上的电压相位滞后其电流 90 o ,电容元件上的电流相位滞后其电压 90 o ,这个结论( )成立。
C.
电感电流和电压、电容电流和电压为非关联参考方向时
D.
电感电流和电压、电容电流和电压为关联参考方向时
【单选题】我国古代广为流传的军事名著,被誉为古今中外最有价值的最有影响的兵书是( )。