皮皮学，免费搜题
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【单选题】
下列不属于醚类化合物的是( )A.
石油醚
B.
乙醚
C.
环氧乙烷
D.
四氢呋喃
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皮皮学刷刷变学霸
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【判断题】Primary bonding is a type of physical bond, while secondary bonding is a type of chemical bond.
A.
正确
B.
错误
【单选题】The chemical bond stabilizing the primary structure of proteins is
A.
hydrophobic interaction
B.
hydrogen bond
C.
peptide bond
D.
ionic bond
【简答题】____ and -S-S- bonds (disulfide bond) are responsible for maintaining the primary structure.
【单选题】Newly issued stocks and bonds are bought and sold in______.
A.
auction markets
B.
primary markets
C.
futures markets
D.
commodity markets
【单选题】I understood that my primary goal had to be the _ of a new bond between the students and me.
A.
formational
B.
formationl
C.
construction
D.
structure
【多选题】In the United States, the three primary bond rating agencies are________.
A.
Standard and Poor ’ s
B.
Mandy ’ s
C.
Moody ’ s
D.
Fitch
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