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【单选题】
《岳阳楼记》的作者是A.
B.
C.
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举一反三
【单选题】【图片】Refer to Figure 1-3. The price paid by buyers after the tax is imposed is
A.
$8.
B.
$10.
C.
$14.
D.
$18.
【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
【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】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】Refer to Figure 2-1. If this economy devotes all of its resources to the production of clocks, then it will produce
A.
0 clocks and 35 candles.
B.
10 clocks and 25 candles.
C.
16 clocks and 0 candles.
D.
16 clocks and 35 candles.
【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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