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【多选题】
以下能够确定香豆素结构中酚羟基对位无取代或C6位上没有取代的是( )。
A.
三氯化铁试剂反应
B.
Emerson反应
C.
盐酸-镁粉反应
D.
Cibb's反应
E.
三氯化铝反应
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举一反三
【单选题】It is an entry ticket to China's US$500 billion ( ) market as well as the bond market.它是中国5000亿美元的A股市场及债券市场的入场券。
A.
B-share
B.
H-share
C.
A-bond
D.
A-share
【单选题】It can be inferred from the passage that______.
A.
China's entry into the WTO will not benefit telecoms particularly
B.
joint ventures will not embrace aggressive recruitment
C.
companies will concentrate on the quality of products
D.
people must better their skills to survive fierce competition
【判断题】诵读I need you.和I want you时,动词和宾语是可以连读的。
A.
正确
B.
错误
【简答题】液体培养基(liquid media)
【单选题】What is the finding of the researchers in treating disease?
A.
[A] Part of treating disease is treating obesity.
B.
[B] Part of treating disease is treating physical inactivity.
C.
[C] Part of treating disease is treating diabetes.
D.
[D] Part of treating disease is treating poverty.
【单选题】What heat treating process makes the metallic carbides in a metal form into small rounded globules?
A.
spheroidizing
B.
stress relieving
C.
annealing
D.
hardening
【简答题】液体制剂(liquid pharmaceutical preparations)
【单选题】Which of the listed effects represents the purpose of heat treating steel?
A.
Develop ductility
B.
Improve machining qualities
C.
Relieves stresses
D.
All of the above
【简答题】what are the Defects & Distortions in Heat Treating?
【简答题】magnetic 有磁性的,带磁性的
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