【单选题】私人物品市场需求曲线是各人需求曲线的( ),公共物品市场需求曲线是各人需求曲线的( )
【单选题】Many Americans believe that ______.
A.
sleep is the first thing that can be sacrificed when one is busy
B.
they need more sleep to cope with the complexities of everyday life
C.
to sleep is something one can do at any time of the day
D.
enough sleep promotes people's drive and ambition
【单选题】Many a man _______sacrificed his life for the cause of revolution.
【判断题】主轴除具有足够的强度、刚度和抗震性之外,还应有较高的回转精度。
【单选题】In the opinion of Justice David Souter.
A.
the interests of the minority can be sacrificed sometimes
B.
the deals struck by the union are for the good of the whole
C.
group rights are under the full protection of union contract
D.
it is reasonable to defend the rights granted by the Congress