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【单选题】
( )用于确定香豆素C6位有无取代基的反应是
A.
异羟肟酸铁反应
B.
Gibb′s试剂反应
C.
Molish试剂反应
D.
水饱和的正丁醇或醇
E.
甲苯-甲酸乙酯-甲酸(5﹕4﹕1)
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举一反三
【单选题】Among all these flowers _____ a kind of red rose, which was given by my friend. [     ]
A.
is included
B.
include
C.
were included
D.
included
【单选题】订房不到者(No-show)是指
A.
临时取消的客人
B.
有预订、但未到,且没有通知饭店的客人
C.
没有预订,但要求住宿的客人
D.
有预订,托人取消预订的客人
【判断题】当级数的一般项式幂函数的时候,把它形成的无穷级数叫做幂级数。
A.
正确
B.
错误
【单选题】三种路由协议RIP、OSPF、IGRP各自得到了一条到达目标网络,在默认情况下,网络最终选定( )路由作为最优路由。
A.
RIP
B.
OSPF
C.
IGRP
D.
静态路由
【简答题】当级数的一般项式幂函数的时候,把它形成的
【单选题】This kind of rose has_
A.
anything special
B.
something special
C.
anything specially
D.
something specially
【判断题】Rose is a kind of wine which is made of rose.
A.
正确
B.
错误
【单选题】I like this kind of rose, for it _______ a pleasant smell.
A.
gives off
B.
gives up
C.
gives in
D.
gives out
【单选题】Which following kind of wood is NOT used to make a guitar?
A.
Sandalwood.
B.
Maple.
C.
Rose.
D.
Ash.
【简答题】The green rose is a __________(develop)from a very old kind of rose.
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