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【单选题】
某系统采用短作业优先的调度策略,现有作业序列:作业1(提交时间:8:00,运行时间1.50),作业2(提交时间:8:30,运行时间0.80)作业3(提交时间:9:00,运行时间0.10),作业4(提交时间:9:30,运行时间0.30),单位:小时,以十进制计。其平均带权周转时间为:( )
A.
4.65
B.
3.00
C.
5.52
D.
12.23
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A.
愈伤组织再生系统
B.
直接分化再生系统
C.
原生质体再生系统
D.
以上都是
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A.
正确
B.
错误
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【简答题】Task 8 You are going to hear a talk on Canada. As you listen, complete the notes by writing No More Than Three Words. Canada is located in the northern half of the continent of 1.___________. The mos...
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【单选题】Why was the year 1886 so special to Pemberton?
A.
He took to doing a job like Sherlock Holmes's.
B.
He brought a quite profitable product into being.
C.
He observed the founding ceremony of Statue of Liberty.
D.
He was awarded by Coca-Cola for his contribution.
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【简答题】常用的基体材料有( )、( )、( )
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【单选题】On which of the following would the author mostly agree?
A.
The future masters of the world will probably be more different from us, than we are from Neanderthals.
B.
A company that develops a new creature or a new organ has the right  to register a patent on its DNA sequences.
C.
Our late modern world has created the most unequal of all societies.
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【简答题】The majority of people in this country eat too much fat and not enough fibre(纤维) and for most people a having a healthy diet is and easy to do. The move towards a healthy diet may just mean eat...
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