It mentions a puzzling situation, and then describes three approaches people have taken to help understand that situation.
It presents an argument for why something took place, and then offers a refutation of that argument.
It introduces a past phenomenon and then presents three explanations for why the phenomenon took place.
It describes a problem, offers a solution to the problem, and then ofiers reasons why the solution could not work.
It offers three explanations for a phenomenon and then summarizes what all three have in common.
第1题：
A. Point to Point
B. Point to Multipoint
C. VLAN
D. Ring
E. Bus
第2题：
In an iostat report， which of the following options best describes the value of % tm_act？（）
第3题：
Which of the following words best describes the author’s attitude towards China’s high-speed railway plan?
A．Critical．
B．Reserved．
C．Doubtful
D. Positive．
第4题：
Which of the following BEST describes RAID 1?（）
第5题：
Which of the following BEST describes RAID 5?（）
第6题：
Which of the following BEST describes a hub?（）
第7题：
Which of the following BEST describes RAID 10？（）
第8题：
A. Care-taker talk
B. Timely error correction.
C. Selected input
D. Minimal pair practice.
第9题：
Which of the following BEST describes a benefit of RAID 0?（）
第10题：
A technician needs to troubleshoot connectivity between two devices located on the same network. Which of the following BEST describes the type of protocol being used?（）