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【简答题】
某化合物的最大吸收波长为 280nm ,光线通过该化合物的 1.0*10mol.L -1 溶液时,透射率为 50% (用 2cm 吸收池),求该化合物在 280nm 处的摩尔吸收系数
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【单选题】Look at the four squares,A ,B ,C , and D, which indicate where the following sentence could be added to the passage. Where would the sentence best fit? Sophisticated plumbing was needed to service bat...
A.
Square Ａ.
B.
Square Ｂ.
C.
Square Ｃ.
D.
Square Ｄ.
【单选题】Although __________happened in that developed country sounds like science fiction， it could occur elsewhere in the world．
A.
which
B.
what
C.
how
D.
it
【简答题】The fire spread through the hotel very quicklybut everyone __________get out.[A]hadto[B]would[C]could[D]wasable to
【单选题】Since the thief cut the stick short, ________.
A.
he was found out
B.
the judge couldn’t catch him
C.
his stick had an equal length with the others’
D.
his stick wouldn’t be any longer
【单选题】We ________the difficulty together, but why didn't you tell me? [ ]
A.
should face
B.
might face
C.
could have faced
D.
must have faced
【简答题】hot sale_____
【单选题】_____ makes a new invention such a wonderful thing is ____ it allows us to do something ____ we could not do before.
A.
What; what; what
B.
That; that; /
C.
What; that; /
D.
That; what; that
【单选题】The purpose of the home was to rehabilitate patients as far as possible, so that they could face the harsh realities of life outside hospital. Most of them not only suffered from some form. of nervous...
A.
the hospital
B.
the refuge camp
C.
the research centre
D.
the place away from reality
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