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云南自考网> 试题题库列表页> Task 220. It is popularly believed that all research needs ca 21. One should make sure the research is____22. It is as difficult to solve a useful problem as to 23. One may need some simple equipment to overcome 24. Not many people realize that it is difficult to 25. Failures in research A. happen very oftenB. worth doingC. do something newD. lose one's patienceE. solve a useless oneF. expensive scientific equipmentG. the major difficulties in research
英语(一)模拟试卷一
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