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【单选题】
轨距是钢轨轨头部踏面下()范围内两钢轨作用边之间的最小距离。A.
15mm
B.
16mm
C.
17mm
D.
18mm
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【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；...
A.
0
B.
1
C.
2
D.
5
【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（ ）
A.
X只能位于第二周期
B.
a一定小于b
C.
(b－a＋m＋n)一定等于16
D.
Y只能位于第三周期
【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.
【单选题】A country's domestic currency's real exchange rate, q, is defined as
A.
E.
B.
E times P.
C.
E times P.
D.
(E times P)/P.
E.
P/(E times P).
【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*)
C.
a 3% increase in E
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.
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