Blood doping increases the capacity for oxygen delivery by
A. enlarging muscle fibers.
B. increasing blood flow.
C. raising hemoglobin count.
D. making an athlete's mind active.
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The development of high-tech manufacturing processes
A. contributes a lot to the rapid development of the national economy.
B. may not be beneficial to workers.
C. will inevitably impose upon workers permanent unemployment.
D. generally results in a low unemployment rate.
The author develops the idea that blood doping works in the laboratory by
A. listing the disadvantages of blood doping.
B. explaining how blood doping tainted the triumphs of some Olympians.
C. presenting some of the research findings.
D. telling the readers about the athletes' competition results.
Which of the following statements is true according to the passage？
A. Those who admit blood doping will be punished by law.
Blood doping does athletes good.
C. The athletes who blood-doped are sure to win.
D. There is no way to find out the cases of blood doping.
In recent years much more emphasis has been put ______ developing the students' productive
A. onto
B. in
C. over
D. on
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