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【单选题】
下列关于 Km 的叙述,错误A.
Km 是酶的特征性常数
B.
Km 可以近似表示酶对底物亲和力的大小
C.
Km 与酶的性质、酶所催化的底物有关
D.
Km 与酶的浓度有关
E.
Km 值等于酶促反应速度为 1/2 Vmax 时的底物浓度
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举一反三
【单选题】Australia is a hot and dry continent and______of the country lies in the topics.
A.
one third
B.
half
C.
two fifths
D.
three sevenths
【单选题】We have been () walnutmeat form. the local commission houses, who () send us quotations regularly.
A.
bought,used to
B.
buying,used to
C.
buy,are used
D.
bought,used to
【单选题】There will be more than 900 graduates from this university this year, ______ only one third could work in the state-run industry.
A.
from whom
B.
in them
C.
of whom
D.
by which
【简答题】写数字。 1. twenty ___________ 3. four ___________ 5. fif ___________ 2. eigh ___________ 4. thir ___________ 6. eleven ___________
【单选题】_____ of the students in Class One ____ already seen the movie.
A.
Three fourths, have
B.
Third fourths, have
C.
Four thirds, have
D.
Three fourths, has
【简答题】We will now very much appreciate receiving at the earliest possible moment your quotation _________ tea for the new season.
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