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【简答题】
光源投射在被摄景物上的光线（）即为光源的光照度
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举一反三
【单选题】They usually have a short ______ after lunch. [ ]
A.
sleeping
B.
sleep
C.
to sleep
D.
asleep
【单选题】"one short sleep past, we wake eternally" is taken form te poem written by _______.
A.
William shakespeare
B.
John Donne
C.
John Milton
D.
John Keats
【单选题】'One short sleep past, we wake eternally' is taken from the poem written by______.
A.
William Shakespeare
B.
John Donne
C.
John Milton
D.
John Keats
【简答题】Unlike humans who tend to have one long sleep, dogs prefer to sleep in ______.
【单选题】A vessel sounding a fog signal of one short，one prolonged，and one short blast is indicating that the vessel is ().
A.
fishing
B.
in distress
C.
at anchor
D.
not under command
【单选题】According to one resident, they are short of sleep because ______.
A.
they are kept by treating their patients
B.
they are forbidden to sleep at work
C.
they are too tired to fall asleep
D.
they are too worried about oversleeping
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