试题与答案

下列关于肽键性质和组成的叙述正确的是( )。 A.由CO和C-COOH组成 B.由

题型:单项选择题

题目:

下列关于肽键性质和组成的叙述正确的是( )。

A.由CO和C-COOH组成
B.由Ca1和Ca2组成
C.由Ca和N组成
D.肽键有一定程度双键性质
E.肽键可以自由旋转

答案:

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题型:阅读理解

Mr Smith is a teacher of English.He comes from America.He teaches English in China.He speaks Chinese quite well.

He reads a lot of books and his wife often writes books for the students at home.Mr Smith gets up at five in the morning.He leaves home at ten to six.He begins the first lesson at 8:00.He teaches English every day except Saturday and Sunday.At ten to twelve he finishes his lessons.Ten minutes later he has lunch.In the afternoon,he often plays games with his students.Sometimes he teaches his students in his office.Supper time is at about six.After that,he reads newspapers and watches TV.At about ten to eleven he goes to bed.

小题1:Mr Smith is            

A.a Chinese

B.an Englishmans

C.a worker

D.an American小题2:He leaves home at         

A.6:10

B.5:50

C.7:10

D.6:50小题3:He doesn’t have any English classes on         

A.Saturday

B.Sunday

C.Friday

D.Saturday and Sunday小题4:He has lunch at          

A.12:30

B.12:00

C.13:30

D.13:00小题5:He watches TV or reads newspaper        supper.

A.before

B.after

C.at

D.in

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