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【单选题】
外施交流耐压试验中，对某些试验回路，需允许较大的畸变，应注意到被试品，特别是有（）的被试品可能使波形产生明显畸变。A.
伏安特性
B.
线性
C.
非线性阻抗特性
D.
线性阻抗特性
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举一反三
【单选题】Every time Ashtita tries to break a record, he reaches a point ______ he feels he cannot physically do any more．
A.
where
B.
that
C.
when
D.
which
【单选题】A firm has the long run cost function C(Q) = 5Q 2 + 245. In the long run, it will supply a positive amount of output, so long as the price is greater than:
A.
140
B.
148
C.
35
D.
70
E.
75
【单选题】He's a ______ businessman. He makes a profit at everything he tries.
A.
bright
B.
intelligent'
C.
skillful
D.
shrewd
【单选题】In a monopoly in the long run:
A.
economic profits will be eliminated by the entry of rival firms.
B.
economic profits will be reduced but not eliminated by the entry of rival firms.
C.
entry by other firms will not occur.
D.
the price will be the same as in a perfectly competitive market.
【单选题】A firm has the long run cost function C(q)=4q 2 + 4. In the long run, it will supply a positive amount of output, so long as the price is greater than:
A.
16
B.
24
C.
4
D.
8
【单选题】In the long run
A.
all inputs are fixed
B.
a firm is making the optimal input choice when the marginal rate of technical substitution is equal to the input price ratio
C.
the expansion path shows how the input marginal products change as the firm's output level changes
D.
both a and b
【单选题】As used in the last sentence, the phrase 'in short' means ______.
A.
in the long run
B.
in detail
C.
in fact
D.
in a word
【单选题】A firm has the long run cost function C(Q) = 7Q 2 + 252. In the long run, it will supply a positive amount of output, so long as the price is greater than:
A.
168
B.
176
C.
42
D.
84
E.
89
【简答题】A．He tries to find out all he can about a new environment and puts what he thinks into an immediate action. B．He never feels ashamed of what he has done. C．He puts other people in the position of prio...
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