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【简答题】
呼吸道以 为界分为上呼吸道和下呼吸道。
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举一反三
【简答题】Que les couleurs (ne rien perdre) de leur intensité.
【单选题】If a person's eye has been looking at an object in bright sunlight for some time, and then shifts to an object not well lit--such as a lawn or shrub in shadow--we can expect ______.
A.
a time lag in the focusing ability of the eye
B.
some inability to see colors of the latter-named objects until loss of sensitivity has been regained
C.
the immediate loss of the 'afterimage' of the first object
D.
adaptation in the central area of the eye but little adaptation in the lateral areas to the new intensity level
【简答题】Que les couleurs ne perdent rien leur intensité.
【单选题】（ ）The main idea of the third paragraph is that．
A.
the mass of the fishDecides the intensity of electric power it generates
B.
the strength of shock givenBy a young electric ray can only light theBulb of apocket flashlight
C.
to make full use of the energy producedBy electric fish，suitable wires shouldBeavailable
D.
a mature torpedo is capable of producing enough electricity to knockDown a man
【单选题】In spite of the treatment, the pain in his leg grew in ______ .
A.
gravity
B.
extent
C.
intensity
D.
amount
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