What is the role of the 4th paragraph in the development of the passage？
A. To show that people don't ask for much about their dream job.
B. To show that most people in America are satisfied with their jobs.
C. To offer supporting evidence to the preceding paragraph.
D. To provide a contrast to the preceding paragraphs.
查看答案
What news event is reported？
A bomb threat at a hospital.
B. A flood at a school.
C. A fire at an apartment building.
D. A severe drought famine in a villag
一条线路带宽为1 Mbps，往返时延为45 ms，假设数据帧的大小为1 000字节。若采用停一等协议，实际的数据率是()。
A. 15 Kbps
B. 1．5 Kbps
C. 151 Kbps
D. 1 510 Kbps
【B20】
A. shifts
B. transfer
C. jobs
D. class
The second paragraph implies that testing for anabolic steroids
A. is always accurate and reliable.
B. is proved to be inaccurate.
C. may sometimes show inaccuracy.
D. has helped end doping in sport.
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