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【单选题】
Which of the following is right about the silk road? ( )A.
Zhang Qian and BanChao in Han Dynasty set out two journeys to the Western Regions.
B.
The ancient silk road spent its childhood and gradually grew up in Zhou dynasty.
C.
Tang Dynasty saw the silk road rise to its most flourishing period in history.
D.
The ancient silk road declined gradually in the Yuan Dynasty.
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【单选题】The special present was given to his father on his ___________.
A.
70th birthday
B.
80th birthday
C.
90th birthday
D.
100th birthday
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【单选题】His parents are present there ______, but their minds are somewhere else.
A.
psychologically
B.
apparently
C.
physically
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【简答题】All his classmates say the birthday present belongs to ________ (he).
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A.
scope
B.
space
C.
capacity
D.
range
【简答题】试设计一个能驱动七段LED数码管的译码电路，输入变量A，B，C来自计数器，按顺序O00～111计数。当ABC=000时，全灭；以后要求依次显示H，O，P，E，F，U，L七个字母。采用共阴极数码管。
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