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【多选题】
有关香豆素荧光性质描述正确的是 （ ）A.
大多数的香豆素在紫外光的照射下可呈现绿色荧光
B.
大多数的香豆素在紫外光的照射下可呈现蓝色或紫色荧光
C.
在碱性溶液中荧光增强
D.
在碱性溶液中荧光减弱
E.
荧光的强弱和有无，与分子中取代基的种类和位置有关
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举一反三
【单选题】When I was in hospital, my mother promised me that she would take me to Qingdao ________ I was well enough to travels, which ________ my recovery. [ ]
A.
direct; contributed to
B.
directly; contributed to
C.
directly; refered to
D.
direct; refered to
【单选题】She promised to take my job immediately. That really took a big load my shoulders.
A.
away, down
B.
up, from
C.
over, off
D.
on, away
【简答题】使用游标的一般步骤应为:_______、_______、从游标的结果集中读取数据、对游标中的数据逐行操作、关闭游标和释放游标。
【简答题】Sometimes, happiness is _________ _ ___(associate) with money.
【单选题】(p. 20) On a recent visit to The Home Depot store, a sales associate greeted Madison when she entered the store, helped her locate the items she needed to repair her gutters and suggested how she coul...
A.
Intangibility
B.
Comparability
C.
Divisibility
D.
Perishability
E.
Compatibility
【简答题】Listening Listen to a conversation between a sales associate and a customer. Mark the following statements as true (T) or false (F).
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