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【单选题】
What will happen if there is one commercial bank and no thrifts in a small town?
A.
The residents will deposit their money with the bank.
B.
The local bank will provide business loans to the commercial bank.
C.
Some large banks will transport money by check to the bank.
D.
People in the area will not deposit money with the bank.
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【单选题】The article published in The Lancet Infectious Diseases found that
A.
a new multi -drug resistant bacterium has appeared
B.
some bacteria have developed a new gene to resist almost all antibiotics
C.
some infections are caused by antibiotics
D.
some countries are successful in controlling multi -drug resistant microorganisms
【单选题】In a clearing at the centre of the thicket stood the Tonnerre family's ______.
A.
home
B.
resident
C.
shack
D.
dwell
【单选题】下列有关Km的叙述错误的是
A.
Km是酶的特征性常数
B.
Km是达到最大反应速度一半时的底物浓度
C.
它与酶对底物的亲和力有关
D.
Km最大的底物,是酶的最适底物
E.
同一酶作用于不同底物,则有不同的Km
【单选题】一组数据中的每一个数据都减去 10,得一组新数据,若求得新数据的平均数是6,方差是5,则原来数据的平均数和方差分别是 ( )
A.
16 ， 5
B.
4 ， 5
C.
6 ，1 5
D.
6 ， 5
【多选题】60下列()是平地机作业前应该检查的项目。
A.
照明、音响装置齐全有效
B.
燃油、润滑油、液压油等符合规定
C.
各连接件无松动
D.
液压系统无泄漏现象
E.
轮胎气压符合规定