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【单选题】
What is the bid-ask spread?A.
the difference in price available for an immediate sale of a stock and the immediate purchase of the stock
B.
all of the costs and fees that a stock exchange charges in order to process a transaction
C.
the rise or fall in the value of a stock between the time it is acquired by an investor and sold by that investor
D.
the difference in the selling price of a stock between different exchanges
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举一反三
【单选题】According to the author, the staff can perform. better by ______.
A.
getting instructions from their senior managers
B.
seizing what to do at hand and what to do next
C.
having a financial forecast as a goal
D.
sharing their goals with others
【单选题】以下程序中，当用户输入abc时，程序的输出结果是（）try: n = 0 n = input("请输入一个整数: ") def pow10(n): return n**10except: print("程序执行错误")
A.
程序执行错误
B.
0
C.
abc
D.
程序没有任何输出
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