脑血栓形成的患者早期溶栓是指发病后几小时采用溶栓治疗:
A. 8小时
B. 9小时
C. 10小时
D. 6小时
51. What does the author use the example of his father to illustrate?
A. How long people took to reach the top of their career.
B. How people accumulated wealth in his father's time.
C. How people viewed success in his father's time.
D. How long people usually stayed in a company.
52. Why did people often change jobs when the author started his career?
A. It was considered a fashion at that time.
B. It was a way to advance in their career.
C. It was a response to the changing job market.
D. It was difficult to keep a job for long.
53. What does the author say about people now working for several businesses at the same time?
A. They are often regarded as most treasured talents.
B. They are able to bring their potential into fuller play.
C. They have control over their life and work schedules.
D. They feel proud of being outstanding problem solvers.
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