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【单选题】
光绪年间，在张家口从事对蒙、俄贸易和运输业务的旅蒙商人就达到（ ）家。A.
300
B.
400
C.
500
D.
600
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反馈参考答案：
举一反三
【简答题】We must rely on out own efforts to (convert the results of scientific research into productivity).
【单选题】When we use our imagination in making a plan ______.
A.
we can be more sure of our goals
B.
we will be clearer of our achievement
C.
we will have a more practical mind
D.
we will be more determined to finish it
【单选题】We learn our cultural signs______.
A.
when we keep our peace of mind
B.
when we are unconscious
C.
when we grow up
D.
when we accept the beliefs of our culture
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