【单选题】下列说法: (1)如图1,已知PA=PB,则PO是线段AB的垂直平分线; (2)对于反比例函数 y= 2 x ,(x 1 ,y 1 ),(x 2 ,y 2 )是其图象上两点,若x 1 <x 2 ,则y 1 >y 2 ; (3)对角线互相垂直平分的四边形是菱形; (4)如图2,在△ABC中,∠A=30°,BC=2,则AC=4; (5)一组对边平行的四边形是梯形; (6) y= k x 是反比例函数;...
【单选题】X、Y均为短周期元素,已知 a X m+ 比 b Y n- 少2个电子层,则下列说法正确的是( )
【单选题】The real income of domestic producers and consumers may be increased by:
A.
technological progress, but not international trade.
B.
international trade, but not technological progress.
C.
neither technological progress nor international trade.
D.
both technological progress and international trade.
【判断题】若工作负责人需要长期离开现场,应由新工作票签发人变更工作负责人。
【单选题】9) Which of the following events will cause the largest real depreciation for the domestic economy?
A.
a 6% increase in the domestic price level (P) and a 6% reduction in P*
B.
a 6% reduction in E and a 6% increase in the foreign price level (P*)
D.
a 2% increase in E and a 2% increase in P
E.
a 6% reduction in E and a 6% reduction in P*
【简答题】( )是人脑的机能和属性,是客观世界的主观映象。
【单选题】A country's domestic currency's real exchange rate, q, is best described by
A.
the price of similar goods in the same market.
B.
the price of the domestic basket in terms of the foreign one.
C.
the price of a domestic basket.
D.
the price of the foreign basket in terms of the domestic basket.
E.
the price of different goods baskets in the same market.
【单选题】水果可分为浆果类、柑橘类、核果类、仁果类、瓜类和其他类,葡萄属于其中的哪一类?
【单选题】尾座移动的最大行程为( )mm,预紧力的大小由液压系统的压力来调整。