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【单选题】
下列哪一项不是 Km 值的功能( )A.
Km 值是酶的特征物理常数，可用于鉴定不同的酶
B.
Km 值可以表示酶与底物之间的亲和力， Km 值越小、亲和力越大
C.
用 Km 值可以选择酶的最适底物
D.
比较 Km 值可以估计不同酶促反应速度
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举一反三
【简答题】The dramatic decline in the enrollment of foreign students in the U.S after September 11 was caused by________.
【简答题】What is the present percentage of men college students in the U.S. ?
【单选题】What has happened to the U.S. and Britain in terms of overseas students?
A.
The U.S. stays firmly as No. 1 choice for students.
B.
Britain raised by 20 percent its overseas students last year.
C.
Both countries forecast a rise in the student number.
D.
Both countries are losing their market share.
【单选题】Why is scientific training becoming less attractive to U. S. students?
A.
Because the U. S. students are unwilling to face the competitions between them and foreign students.
B.
Because it is not so rewarding in this career path as before due to the increasing amount of students.
C.
Because foreign students take up good position in this field for their advantage.
D.
Because U. S. students do not think scientific training can help them make a lot of money.
【简答题】视图包括基本视图、向视图、____和斜视图。
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