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 高等继续教育 / 面向对象程序设计
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题型描述: 多选题
关于封装,下列说法中正确的是( )。
A.通过封装,对象的属性都是不可见的
B.通过封装,对象的全部属性和操作结合在一起,形成一个整体
C.通过封装,每个对象都成为相对独立的实体
D.通过封装,一个对象的实现细节被尽可能地隐藏起来(不可见)
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  • 题型描述: 阅读理解A team of archaeologists (考古学家) has gone to New Mexico to look for proof of one of the greatest stories of the 20th century: the UFO crash at Roswell. William Foleman, an archaeologist at the University of New Mexico, agreed to excavate (发掘) the site where the UFO supposedly crashed in 1947. What exactly happened on the site is unclear. In 1947, a young man discovered some debris (碎片) on the field. After investigating the crash, the US Army announced they had recovered a “fly disc”. Several hours later, an Air Force general announced that the crash was caused by a weather balloon again. The field was closed off for several days while the military cleaned up the site. Believers claim that the military found a crashed UFO, along with several dead bodies at the site. This story has inspired countless books, movies and TV shows, but no one has been able to find any evidence to support it. In 1997, the Air Force said the weather balloon story was made up and that the military was actually conducting a crash-test program with balloons. But Foleman isn’t so sure. While he says he’s “Still uncertain” about UFOs, he knows that “something happened in July 1947”.1.Some people believe a UFO _ _ _ _ _ _ at Roswell.A. LandedB. flewC. crashedD. disappeared2.An archaeologist went to the site to look for _ _ _ _ _ _ .A. fossilsB. aliensC. evidenceD. Answers3.In 1947 some debris (残骸) was found _ _ _ _ _ _ .A. in a fieldB. in a houseC. in a parkD. on a military base4.The Air Force said the debris had come from a(an) _ _ _ _ _ _ .A. planeB. weather balloonC. carD. explosion5.In 1997, the Air Force said their original story was _ _ _ _ _ _ .A. FalseB. exaggerated (夸张的)C. unclearD. true专科英语I