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【单选题】
肠线打结剪线后,留下线头长度一般为A.
l一2毫米
B.
2一3毫米
C.
3一4毫米
D.
4一5毫米
E.
5毫米以上
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举一反三
【单选题】带缓冲区的字符型输入流类BufferedReader继承字符型输入流类Reader，然后扩展了下列哪个方法？（ ）
A.
ready()
B.
read()
C.
close()
D.
readLine()
【单选题】带缓冲区的字符型输入流类 BufferedReader继承字符型输入流类Reader,然后扩展 了( )方法。
A.
ready ( )
B.
read( )
C.
close( )
D.
readLine()
【单选题】Economic profit
A.
is a theoretical measure of a firm’s performance and has little value in real world decision making.
B.
can be calculated by subtracting implicit costs of using owner-supplied resources from the firm’s total revenue.
C.
is negative when costs exceed revenues.
D.
is generally larger than accounting profit.
【简答题】固体分散体常用的载体材料主要有______、______和______三类。
【单选题】The maximum total economic profit that can be made by colluding duopolists
A.
is less than the economic profit made by a monopolist.
B.
equals the economic profit made by a monopolist.
C.
exceeds the economic profit made by a monopolist.
D.
bears no necessary relation to the economic profit made by a monopolist.
【单选题】Economic profit is
A.
the difference between total revenue and the opportunity cost of all of the resources used in production.
B.
the difference between total revenue and the implicit costs of using owner-supplied resources.
C.
the difference between accounting profit and the opportunity cost of the market-supplied resources used by the firm.
D.
the difference between accounting profit and explicit costs.
【简答题】固体分散体的载体材料有水溶性、（）和（）
【单选题】Economic profit:
A.
cannot be negative.
B.
can exceed the risk-adjusted normal rate of return.
C.
is less than the risk-adjusted normal rate of return.
D.
does not reflect the cost of owner-supplied inputs.
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