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【单选题】
显示指定文件的前若干行的命令是（）。A.
less
B.
tail
C.
more
D.
head
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反馈参考答案：
举一反三
【单选题】What two questions does SETTING answer?
A.
What happened? Who was involved?
B.
Who is involved? Why are they involved?
C.
Who are the main characters and what is the problem?
D.
When and where does the story take place?
【多选题】What points does the professor make about the ancient caravan trails? (Choose TWO answers.)
A.
They were at first difficult to see on the SAR map.
B.
They were identical with modern routes.
C.
They identified the site he was looking for.
D.
They were longer than he expected.
【单选题】What are the two main points under discussion?
A.
Socializing and honesty.
B.
Schooling and socializing.
C.
Creativity and curiosity.
D.
Reading and educational system.
【单选题】What are the two main points that the survey by Hiarris Interactive look into?
A.
Computer and cell phone.
B.
College students and their university.
C.
Emails and letters.
D.
College students' surfing habits and buying habits on the Internet.
【简答题】What does the writer of Letter Two insist on? Paying ______ of the amount immediately.
【多选题】What two points does the student make about the history of the High Line? Click on 2 answers.
A.
The High Line once was part of a train line that transported freight.
B.
The High Line originally was built as a park for outdoor art exhibits.
C.
The High Line has long been a popular destination for tourists to New York City.
D.
The High Line was not used for many years.
【简答题】提取基因组DNA后,如何检测DNA的质量?
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