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【单选题】
“ 蔗糖水解反应速率常数的测定 ” 实验中,测定蔗糖溶液的旋光度时,使用的光源是 ( ) 。A.
钠光灯 ;
B.
白炽灯 ;
C.
水银灯 ;
D.
红外灯;
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反馈参考答案：
举一反三
【单选题】Unlike other annelids, echiurans ( ).
A.
have an open circulatory system
B.
do not possess setae
C.
undergo radial cleavage
D.
are not segmented
E.
have enterocoelous coelom formation
【单选题】Coins, unlike other ancient artifacts, are usually found by accident______ by design.
A.
not
B.
rather than
C.
still less
D.
far less
【简答题】Unlike oxygen, the element nitrogen is not active.
【单选题】Unlike commercial banks, other depository financial intermediaries do not have to be much concerned with excess withdrawals of their deposits since they do not have to pay on demand by a depositor.
A.
True
B.
False
【单选题】--- How do you find the latest hit Taijiong ? --- Well, unlike other people, I feel the story is _______touching_______ amusing.
A.
rather; than
B.
other; than
C.
better; than
D.
more; than
【单选题】In the writer's opinion, unlike what other people thought, ______ is a way to avoid facing responsibilities.
A.
staying in his job
B.
being a 'career student'
C.
quitting jobs
D.
going back to college
【单选题】Unlike other girls in school, Jenny played football very well.
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】The constitution, unlike other forms of laws, is fundamental ______ our social system working properly. [ ]
A.
for keeping
B.
to keeping
C.
to keep
D.
with keeping
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