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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.
【单选题】Based on the figure, a sound of a given frequency will have the highest intensity for which of the following sets of conditions? Sound is passing through； S
A.
water； 100%
B.
water； 010–8%
C.
air； 100%
D.
air； 010–8%
【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 dynast.
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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