更多"_____(集中精力于)his scientific research"的相关试题:
[填空题]_____(集中精力于)his scientific research ,he had no time left for recreational activities.
[单项选择]Scientific research that involves international collaboration has produced papers of greater influence, as measured by the number of times a paper is cited in subsequent papers, than has research without any collaboration. Papers that result from international collaboration are cited an average of seven times, whereas papers with single authors are cited only three times on average. This difference shows that research projects conducted by international research teams are of greater importance than those conducted by single researchers.
Which one of the following is an assumption on which the argument depends
A. Prolific writers can inflate the number of citations they receive by citing themselves in subsequent papers.
B. It is possible to ascertain whether or not a paper is the product of international collaboration by determining the number of citations it has received.
C. The number of citations a paper receives is a measure of the importance of the research it reports.
D. The collaborative efforts of scientists who are citizens of the same country do not produce papers that are as important as papers that are produced by international collaboration.
E. (E) International research teams tend to be more generously funded than are single researchers.
[单项选择]
Scientific research has revealed that
throughout the animal world, communication is just as important as it is to
human beings. Countless animals lack the{{U}} (67) {{/U}}for human
speech, yet they employ entirely different methods in order to communicate{{U}}
(68) {{/U}}each other. Some of the most dramatic examples of this are
provided by birds. There arc roughly 10000{{U}} (69) {{/U}}of birds in
the world, each of which has its own miraculous features. {{U}} (70)
{{/U}}you may live, you can see a great number of these feathered creatures
and can{{U}} (71) {{/U}}different and extraordinary properties. In
addition to their flawless flight mechanisms, expertise{{U}} (72)
{{/U}}the routes and timing of migrations, and ability to build nests, their
methods to communicate is{{U}} (73) {{/U}}wonder. At critical times in
birds’ lives, the A. groups B. species C. classes D. regions
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