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【多选题】
香豆素类成分的荧光与结构的关系是
A.
母体有黄色荧光
B.
加碱荧光减弱
C.
7-OH取代,荧光增强
D.
呋喃香豆素荧光较强
E.
8-OH取代荧光消失
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【单选题】Graphic Designer wanted. Design and create graphics for weekly newspaper. University degree in communication art or design necessary, plus one year of job-related experience. Familiarity with publishi...
A.
At a university
B.
At a public-relations firm
C.
At a computer store
D.
At a newspaper
【简答题】I am afraid we will not be able to stop the fire if the firemen do not arrive within ten minutes. I am afraid the fire .
【单选题】施工机械的选择一般说是以满足( )的需要为基本依据。
A.
施工需求
B.
施工环境
C.
施工条件
D.
施工方法
【单选题】How does Amy Wilkins of the Education Trust view minority students' failure to get a degree?
A.
Universities are to blame.
B.
Students don't work hard.
C.
The government fails to provide the necessary support.
D.
Affirmative action should be held responsible.
【单选题】According to the forecast the lowest recorded temperature was______.
A.
51 degrees
B.
65 degrees
C.
in the upper 60s
D.
in the mid to upper 70s
【判断题】After you graduate from your university, your degre can not be taken away from you.
A.
正确
B.
错误
【单选题】适合新酒或者丰厚浓郁型的葡萄酒的醒酒器是下列哪种类型
A.
中肚长颈型
B.
短肚短颈带盖型
C.
大肚长颈型
D.
小肚短颈型
【单选题】----The train will arrive at the station in half an hour. Who ______for us? ----I am sure Dad will be standing there when we get off the train.
A.
will be waiting
B.
was to wait
C.
wait
D.
was about to wait
【简答题】American colleges and universities failed to graduate half of their four-year degree candidates because ________. A) most of them lack high-quality faculties B) the interests of most faculty members l...
【单选题】21 下列化合物中除( )外,其余均为芳香胺。
A.
B.
C.
D.
D
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