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【简答题】
A．Nobody would take care of the city. B．There would be no protection from crime. C．There would be no schools. D．People would be very happy.
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举一反三
【单选题】What is the theme of the story?
A.
A friend in need is a friend indeed.
B.
United we stand, divided we fall.
C.
Two heads are better than one.
D.
Save yourself, or save another.
【单选题】What is the theme of the dialogue?
A.
It is very convenient to drive a car.
B.
Driving is very popular in modern society.
C.
Driving a car can cause a lot of traffic problems.
D.
Riding bikes is good for the environment.
【单选题】What is the theme of the passage?
A.
People who are blind still have the courage and willpower to overcome their difficulties.
B.
Blind people can still find beauty in life although they cannot enjoy the sights of the world.
C.
Blind people are still optimistic about life although they cannot see the world around them.
D.
People who are blind still can enjoy themselves if they do things that don't involve sight.
【单选题】下列关于酶活性部位的描述,哪一项是错误的
A.
活性部位是酶分子中直接与底物结合，并发挥催化功能的部位
B.
活性部位的基团按功能可分为两类，一类是结合基团、一类是催化基团
C.
酶活性部位的基团可以是同一条肽链但在一级结构上相距很远的基团
D.
不同肽链上的有关基团不能构成该酶的活性部位
E.
酶的活性部位决定酶的专一性
【单选题】下列关于酶活性部位的描述,哪一项是错误的
A.
活性部位是酶分子中直接与底物结合，并发挥催化功能的部位
B.
活性部位的基因按功能可分为两大类：一类是结合基团，一类是催化基团
C.
酶活性部位的集团可以是同一条肽链但在一级结构上相距很远的集团
D.
不同肽链上的有关基团不能构成该酶的活性部位
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