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【简答题】
活塞式发动机大多是四冲程发动机,活塞在气缸内经过的四个冲程分别是: 、 、 、 。
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【单选题】下列存储器中，存储速度最快的是（）
A.
内存储器
B.
U盘存储器
C.
硬盘存储器
D.
光盘存储器
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【单选题】下列存储设备中，存储速度最快的是()
A.
软盘、
B.
硬盘
C.
光盘
D.
内存
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【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( )。
A.
O型
B.
M型
C.
Y型
D.
H型
查看完整题目与答案
【单选题】Suppose a country has been running a persistent government budget deficit. If the deficit is reduced, but remains positive,
A.
government debt will increase.
B.
government debt will decrease.
C.
the country will experience a budget surplus.
D.
interest payments on the debt immediately will decrease.
查看完整题目与答案
【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（ ）。
A.
O 型
B.
M 型
C.
Y 型
D.
H 型
查看完整题目与答案
【单选题】Suppose a country is producing $20 million of real GDP. If the economy grows at 10 percent per year, approximately how many years will to take for real GDP to grow to $80 million?
A.
14
B.
7
C.
4
D.
30
查看完整题目与答案
【单选题】Suppose a country is producing $20 million of real GDP. If the economy grows at 10 percent per year, approximately how many years will to take for real GDP to grow to $80 million?
A.
14.00
B.
7.00
C.
4.00
D.
30.00
查看完整题目与答案
【单选题】液压缸浮动应选用 型中位机能的换向阀。
A.
O
B.
H
C.
M
D.
P
查看完整题目与答案
【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
查看完整题目与答案
【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.
查看完整题目与答案
相关题目：
【单选题】下列存储器中，存储速度最快的是（）
A.
内存储器
B.
U盘存储器
C.
硬盘存储器
D.
光盘存储器
查看完整题目与答案
【单选题】下列存储设备中，存储速度最快的是()
A.
软盘、
B.
硬盘
C.
光盘
D.
内存
查看完整题目与答案
【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( )。
A.
O型
B.
M型
C.
Y型
D.
H型
查看完整题目与答案
【单选题】Suppose a country has been running a persistent government budget deficit. If the deficit is reduced, but remains positive,
A.
government debt will increase.
B.
government debt will decrease.
C.
the country will experience a budget surplus.
D.
interest payments on the debt immediately will decrease.
查看完整题目与答案
【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（ ）。
A.
O 型
B.
M 型
C.
Y 型
D.
H 型
查看完整题目与答案
【单选题】Suppose a country is producing $20 million of real GDP. If the economy grows at 10 percent per year, approximately how many years will to take for real GDP to grow to $80 million?
A.
14
B.
7
C.
4
D.
30
查看完整题目与答案
【单选题】Suppose a country is producing $20 million of real GDP. If the economy grows at 10 percent per year, approximately how many years will to take for real GDP to grow to $80 million?
A.
14.00
B.
7.00
C.
4.00
D.
30.00
查看完整题目与答案
【单选题】液压缸浮动应选用 型中位机能的换向阀。
A.
O
B.
H
C.
M
D.
P
查看完整题目与答案
【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
查看完整题目与答案
【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.
查看完整题目与答案