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【单选题】
整流电路后加滤波器的目的是 。A.
提高输出电压值
B.
降低输出电压值
C.
减小输出电压脉动程度
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【简答题】In the United States the most popular form of folk dancing has been square—dancing since the earlier days．In those days，men and women worked in groups to build a house or harvest crops．When the work w...
【单选题】The statue standing in the middle of the square has been built _______ those who sacrificed their lives for people but expected nothing _______.
A.
in memory of; in return
B.
with memory of; for return
C.
in honor of; in award
D.
with honor of; in reward
【简答题】机体调节钙磷代谢的激素主要有 、 和 。
【单选题】—Has the design of the city square been decided? —No, it’s still ______ to suggestions.
A.
open
B.
welcome
C.
ready
D.
hopeful
【单选题】Which of the following descriptions about the Pioneer Square is INCORRECT?
A.
The square has survived lean financial times.
B.
It is only a center of art galleries.
C.
It once became a Wild West Main Street lined with brothels.
D.
The square was once a Native American village.
【单选题】Square dancing ________ to help maintain fitness has caused conflicts between the Damas and the neighboring residents.
A.
claiming
B.
claimed
C.
having claimed
D.
to claim
【简答题】调节钙磷代谢的激素有 、 、 。
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