【简答题】/*输出 2000~2050 年中所有的闰年,要求每行输出四个年号。*/
【单选题】关于生产者均衡点的下列看法中错误的有( )。
B.
生产者均衡点在理论上可以脱离等成本线而存在;
D.
在生产者均衡点上,等成本线与等产量曲线斜率相等但符号相同。
【判断题】交流负反馈有四种基本组态:电压串联负反电 馈 、电压并联负反馈、电流串联负反馈、电流并联负反馈。
【简答题】调车手信号中昼间指挥机车向显示人反方向稍行移动的信号——拢起的红色信号旗( ),再用展开的绿色信号旗上下小动;夜间——绿色灯光上下小动
【单选题】听力原文:W:I can't understand why Jane isn't here yet.We agreed to meet at half past ten.It is almost eleven.And the conference will begin two hours later. M:She probably just got tied up in traffic.Let's...
A.
They will go to the conference first.
B.
They will give up waiting for Jane.
C.
They will wait for Jane for a while.
D.
They will not attend the meeting today.
【简答题】调车手信号中昼间指挥机车向显示人反方向稍行移动的信号——拢起的红色信号旗( ),再用展开的绿色信号旗上下小动;夜间——绿色灯光上下小动A. 直立平举
【单选题】Rather than doing this via auction or through private art dealers they can give them to the government, which buys them at an agreed price ______ them
A.
after having, independently valued
B.
after having, independently valuable
C.
by having, independently valueless
D.
by having, independently value