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【单选题】
关于Km值的说法哪项正确？( )A.
Km值越小则酶与底物亲和力越小
B.
是酶的特征性常数，与酶浓度无关
C.
与底物的种类无关
D.
受酶和底物的浓度影响
E.
酶的Km值越小则催化效率越低
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【单选题】Why is the air quality tested every day?
A.
Just in case someone asks．
B.
Scientists like to take tests．
C.
Scientists are not very busy．
D.
To keep track of pollution levels.
【单选题】Most of the time in greetings (问候). when someone asks 'How are you'? in English. it just means (意思是) 'Hello. ' The speaker is not really asking know you feel or how you aiding. If you know someone ver...
A.
True.
B.
False.
【单选题】It is bad manners for you to say ______ when someone asks you a question.
A.
I don't know
B.
a lot of things
C.
nothing
【单选题】If a teacher asks students to list as many ways as they can to tell someone to open the door and list the possible functions of a sentence in different contexts， he / she is probably trying to highlig...
A.
the potential meanings of a sentence
B.
different realizations of the same function
C.
the relationship between form. and function
D.
different ways of getting people to do the same thing
【简答题】An (enquire) _____________ is a question that someone asks.
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