举一反三
- The tracks of high-speed train must have a ________ A: longer curve radius B: shorter curve radius C: thinner curve radius D: wider curve radius
- Compared with the district, there is no in the roadway system of the strip district, and the roadway system is greatly simplified.
- The section arranged by the panel roadway is divided into rectangles, and the section roadway is excavated along .
- If the market price of a good is above the equilibrium price ______ A: a surplus will exist, which will put downward pressure on the prices. B: the supply curve will shift to the right as firms rush to take advantage of the high price. C: the demand curve will shift to the left as consumers decrease the quantity they buy. D: the government will intervene to force the price downward. E: a shortage will exist, which will force the price even higher.
- Ungated _____ should only be permitted where the sight distance from the roadway exceeds 100 meters. A: fencing B: ailroad crossings
内容
- 0
7. To produce an even pressure of the discs by allowing the lower spine to curve naturally.
- 1
What is the main difference between probability density function (PDF) and histogram? A: The calculation methods for histogram and PDF are different B: The values on histogram curve are larger than the values on PDF curve C: The shapes of histogram curve and PDF curve are different D: The integration of the PDF curve equals 1, the step of ordinate axis in the histogram is 1
- 2
Monopoly maximizes its profit mainly rely on its ___. A: demand curve B: cost curve C: supply curve D: demand curve and cost curve
- 3
Rising oil prices in the U.S. during the 1970s caused the economy’s ( ) A: aggregate supply curve to shift to the right. B: aggregate supply curve to shift to the left. C: aggregate demand curve to become vertical. D: aggregate demand curve to become horizontal.
- 4
a long section of track without joints A: dedicated line B: curve radius C: continuous welded rail