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【简答题】
A．肺炎球菌肺炎 B．支原体肺炎 C．大肠杆菌肺炎 D．金黄色葡萄球菌肺炎 E．肺炎克雷白杆菌肺炎 最易引起脓气胸的是( )
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【简答题】三级管工作在放大区,要求(
)A. 发射结正偏，集电结正偏 B. 发射结正偏，集电结反偏 C. 发射结反偏，集电结正偏 D. 发射结反偏，集电结反偏
【单选题】Which one of the following statements related to the internal rate of return (IRR) is correct?
A.
The IRR yields the same accept and reject decisions as the net present value method given mutually exclusive projects.
B.
A project with an IRR equal to the required return would reduce the value of a firm if accepted.
C.
The IRR is equal to the required return when the net present value is equal to zero.
D.
Financing type projects should be accepted if the IRR exceeds the required return.
E.
The average accounting return is a better method of analysis than the IRR from a financial point of view.
【单选题】根据以下内容回答题：Each nation has its own peculiar character which distinguishes it from others．But the peo-pies of the world have more points in common than points in which they differ．One type of per-son th...
A.
each nation is peculiar enough to enable us to distinguish it from others
B.
the peoples of the world are as alike as they are different
C.
the peoples of the world have more similarities than differences
D.
those who do．more than is strictly necessary are common in every country
【多选题】Which two statements are true regarding single row functions?（）
A.
They accept only a single argument
B.
They can be nested only to two levels
C.
Arguments can only be column values or constants
D.
They always return a single result row for every row of a queried table
E.
They can return a data type value different from the one that is referenced
【单选题】根据以下内容回答题： Each nation has its own peculiar character which distinguishes it from others．But the peo-pies of the world have more points in common than points in which they differ．One type of per-son t...
A.
each nation is peculiar enough to enable us to distinguish it from others
B.
the peoples of the world are as alike as they are different
C.
the peoples of the world have more similarities than differences
D.
those who do．more than is strictly necessary are common in every country
【多选题】Which three statements are true regarding single-row functions？（）
A.
They can accept only one argument.
B.
They can be nested up to only two levels.
C.
They can return multiple values of more than one data type.
D.
They can be used in SELECT， WHERE， and ORDER BY clauses.
E.
They can modify the data type of the argument that is referenced.
F.
They can accept a column name， expression， variable name， or a user-supplied constant as arguments.
【多选题】Which four are attributes of single row functions? （）
A.
cannot be nested
B.
manipulate data items
C.
act on each row returned
D.
return one result per row
E.
accept only one argument and return only one value
F.
accept arguments which can be a column or an expression
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