不同学科范围内的文献的半生期长短是不一样的,生物医学类的文献半生期要比地质、地理学短。
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创新性原则是景区项目策划首先坚持的原则。
A. 对
B. 错
景区项目策划首要坚持的原则是因地制宜原则。
A. 对
B. 错
Complete the following passage with the information you get from the text.When Steve Jobs, the 1)____ of Apple Inc. Resumed his position as the CEO, it was considered an event with great 2)____ in the history of modern business. Three decades ago, the college 3)____ with no formal 4)____ background found a way to turn his electronics hobby into a fledgling business with his friend.Now he has successfully established his position in the foremost ranks of the WestCoast tech 5)____. With passionate spiritual aspirations, clear understandingof customer needs and that famed 6)_____to details, Steve Jobs successfullyturned Apple from a 7)_____ business into a legend, which has experiencedconsecutive successes of iPod in 2001, iPhone in 2007 and iPad in 2010, and hasfinally 8)_____Microsoft in May to make it the world's most valuable 9) _____ concern. Now as a leader in this smartphone business, Apple is ready totake the competition. However, since Mr. Jobs has set a 10)_____standard forrivals, they have no predators at this point.