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【简答题】
在紫外 - 可见吸收光谱中 , 一般电子能级跃迁类型为 : _____ , _____ , _____ , _____ 。
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反馈参考答案：
举一反三
【单选题】There will be great demand on your efforts before you reach the ______ of the race.
A.
dead line
B.
end line
C.
finish line
D.
finishing line
【单选题】______ there are only 20 minutes left before the train left, I felt uneasy in the taxi to the railway station.
A.
That
B.
When
C.
Which
D.
Because
【单选题】Hardy bulbs do not include _____________ .
A.
crocuses
B.
ranunculus
C.
snowdrops
D.
daffodils
【单选题】Do you sell light bulbs here?
A.
http://leicloud.ulearning.cn/course/mediacontent/20130911/lesson-09/audio/toeic_ch08_07_04_02a.mp3
B.
http://leicloud.ulearning.cn/course/mediacontent/20130911/lesson-09/audio/toeic_ch08_07_04_02b.mp3
C.
http://leicloud.ulearning.cn/course/mediacontent/20130911/lesson-09/audio/toeic_ch08_07_04_02c.mp3
【多选题】眼功要以眼神定功为主,是戏曲表演中不可忽视的训练科目,眼功如何训练?
A.
以眼睛定神为基础
B.
以分辨色彩、数数为初级练习
C.
结合规定的神态训练
D.
根据剧中人物、年龄、性格、行当，分步骤训练
【单选题】Why does the professor mention a merchant who ate tulip bulbs?
A.
To explain how the Turks introduced the flower to European visitors
B.
To explain what happened to tulip bulbs that did not produce desirable colors
C.
To give an example of one way that the rich in the Netherlands showed off their wealth
D.
To illustrate her point that Europeans were unfamiliar with the flower
【单选题】Usually the panels are interlocked with _____ so that the devices can be made dead before the doors are opened.
A.
protective earth
B.
isolators
C.
ground switch
D.
circuit-breakers
【单选题】听力原文：W: I've been around the whole store, but I couldn't find any sixty-watt bulbs. Don't you carry them anymore? M: Oh, they used to be on Aisle 12, but we've moved them. Now you'll find them at the ...
A.
Toilet bowl cleanser.
B.
Household goods.
C.
Light bulbs.
D.
Tulips.
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