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【简答题】
股票价格为50元，无股息，6个月后到期，执行价格为55元的欧式看涨期权价格为3元，同样期限和执行价格的欧式看跌期权价格为7.5元，年利率为5%。问是否存在套利机会，如果存在，该如何套利？
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举一反三
【单选题】______ is the branch of linguistics which studies the sound patterns of languages from a function perspective.
A.
Phonetics
B.
Semantics
C.
Phonology
D.
Sociolinguistics
【单选题】Sound waves reflected from a hill can be used to estimate the ________.
A.
height of the hill
B.
speed of sound
C.
distance to the hill
D.
intensity of sound
【单选题】Under proper conditions, sound waves will be reflected from a hillside or other such obstruction. Sound travels at the rate of about one-fifth of a mile per second. If the hill is eleven hundred feet ...
A.
height of the hill
B.
speed of sound
C.
distance to the hill
D.
intensity of sound
【单选题】Under proper conditions, sound waves will be reflected from the hillside or other such obstruction.
A.
mirrored
B.
bounced back
C.
absorbed
D.
soaked through
【单选题】Sound moves from its source to the ear by wave like fluctuations in air pressure, something like the peaks and troughs or the lowest point of ocean waves. One way to keep from hearing sound is to use ...
A.
the rising and falling of water in the ocean
B.
the crests and valleys of mountain ranges
C.
a flag waving in the air
D.
a machine for measuring air pressure
【简答题】The title of Faulkner's novel The Sound and the Fury is quoted from a sentence in Shakespeare's play ---. A.Macbeth B.King Lear C.Hamlet
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