【单选题】一水平放置的双杆液压缸,采用三位四通电磁换向阀,若要求阀处于中位时,液压泵卸荷,液压缸闭锁不动,其中位机能应选M型;若要求阀处于中位时,液压泵卸荷,液压缸浮动,且液压缸闭锁不动,其中位机能应选用( )。
【单选题】Suppose a country has an overall balance deficit in the fixed exchange rate, when the central bank intervene, there is an ( ) in official international reserve holdings and an ( ) in its liab...
【单选题】一水平放置的双杆液压缸,采用三位四通电磁换向阀,要求阀处于中位时,液压泵卸荷,液压缸浮动,其中位机能应选用H型;要求阀处于中位时,液压泵卸荷,且液压缸闭锁不动,其中位机能应选用( )。
【判断题】对于带通信号,其抽样频率可能低于信号最高频率的 2 倍,仍能够无失真恢复原模拟信号。
【简答题】一水平放置的双伸出杆液压缸,采用三位四通电磁换向阀,要求阀处于中位时,液压泵卸荷,且液压缸浮动,其中位机能应选用H型;要求阀处于中位时,液压泵卸荷,且液压缸闭锁不动,其中位机能应选用( )型。
【单选题】Suppose country A is labor-abundant and capital-scarce and country B is labor-scarce and capital-abundant. Good X is produced using a labor-intensive technology and good Y is produced using a capital-...
A.
Country A would export good X
B.
Country B would import good Y
C.
Country A would import good X
D.
Country B would import both good X and good Y
【单选题】Suppose a country has floated its currency and the central bank sets a contractionary monetary policy. Which of the following is LIKELY to occur?
A.
The country's currency will depreciate.
B.
Interest rates will rise, the currency will appreciate, and any inflationary gap will shrink.
C.
Interest rates will fall, which will reduce aggregate demand.
D.
Net exports will be larger.