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【简答题】
渗透变形产生的必要条件
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【判断题】花键连接的键侧面是工作面,工作时靠键侧面与键槽的挤压传递转矩。
A.
正确
B.
错误
【判断题】花键的工作面是键齿的侧面。
A.
正确
B.
错误
【单选题】Refer to Figure 10-13. If the government imposed acorrective tax that successfully moved the market from the market equilibriumto the social optimum, then tax revenue for the government would amount t...
A.
$1,250.
B.
$1,600.
C.
$2,000.
D.
$2,500.
【判断题】Refer to figure (1) and (2), these two basic solids are assembled to form a simple object shown as figure (3) , 5 dimensions are neede to determine its size. (True or False: 10 Points)
A.
正确
B.
错误
【判断题】单管放大电路是指放大电路中只有一个放大管。
A.
正确
B.
错误
【单选题】已知U=311sin(314t+50°,可求得
A.
U=311V,f=50Hz
B.
U=220V,f=314Hz
C.
U=220V,f=50Hz
D.
U=311V,f=314Hz
【单选题】Figure 10-7 Refer to Figure 10-7. Which quantity represents thesocial optimum for this market?
A.
Q1.
B.
Q2.
C.
Q3.
D.
Q4.
【单选题】Refer to Figure 4-1. What is the equilibrium quantity in this market?
A.
5 units
B.
7.5 units
C.
10 units
D.
The equilibrium quantity cannot be determined from this graph.
【单选题】Figure 4-1 Refer to Figure 4-1. What is the equilibrium price in this market?
A.
$0
B.
$5
C.
$7.50
D.
$10
【单选题】已知e1=311sin (314t+120°) V, e2=311sin (314t-120°) V,则e1与e2的相位关系是______
A.
e¹比e²超前240°
B.
e¹比e²超前120°
C.
e¹比e²滞后120°
D.
无固定的相位关系可言
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