对于关键码序列18,30,35,10,46,38,5,40进行堆排序(假定堆的根结点 发布时间:2018-04-28 19:25 │ 来源:www.tikuol.com 题型:填空题 问题: 对于关键码序列18,30,35,10,46,38,5,40进行堆排序(假定堆的根结点为最小关键码),在初始建堆过程中需进行的关键码交换次数为______。
题型:填空题 固定分裂()A.深吸气时出现分裂,青少年常见B.吸气、呼气时均可听到第二心音(S2),吸气时更明显C.呼气时均可听到第二心音D.S2分裂的时距较固定,不受吸气、呼气的影响E.分裂的S2以呼气时更加明显 查看答案
题型:填空题 阅读理解。 根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 For several years, Americans have enjoyed teleshoppingwatching TV and buying things by phone. 1 In a number of European countries, people can turn on their TVs and shop for clothes ,jewelry,food, toys, and many other things. 2 For example, the biggest Swedish company sells different kinds of things on TV in 15 Europeancountries, and in one year it made $100 million. In France there are two teleshopping channels, and the French spend about $ 20 million a year to buy things through those channels. In Germany, until last year teleshopping was only possible on one channel for 1 hour every day. Thenthe government allowed more teleshopping. Other channels can open for telebusiness, including thelargest American teleshopping company and a 24hour teleshopping company. 3 Some people like teleshopping because it allows them to do their shopping without leaving theirhomes. With all the problems of traffic in the cities, this is an important reason, but at the same time, other Europeans do not like this new way of shopping. 4 Many Europeans usually worry about the quality of the things for sale on TV. Good quality is important to them ,and they believe they cannot besure about the quality of the things on TV. 5 They will have to be more careful about the quality of the things they sell. They will also have towork harder to sell things that the buyers cannot touch or see in person. A. Now teleshopping is starting in European.B. They call teleshopping "Junk on the air".C. Teleshopping is becoming popular in Sweden.D. German businesses are hoping this new teleshopping will help them sell more things.E. The need for high quality means that European teleshopping companies will have to be different from the American companies.F. Teleshopping is popular among people.G. German teleshopping business is controlled by American. 查看答案
题型:填空题 动物种群的跨物种研究表明,出生一个月就与母亲隔离的幼仔常常表现出很强的侵略性。例如,在觅食时好斗且拼命争食,别的幼仔都退让了它还在争抢。解释这一现象的假说是,形成侵略性强的毛病是由于幼仔在初生阶段缺乏由父母引导的社会化训练。 以下哪项陈述如果为真,能够最有力地加强上述论证A.早期与母亲隔离的羚羊在冲突中表现出极大的侵略性以确立其在种群中的优势地位。B.在父母的社会化训练环境中长大的黑猩猩在交配冲突中的侵略性,比没有在这一环境中长大的黑猩猩弱得多。C.出生头三个月被人领养的婴儿在童年时期常常表现得富有侵略性。D.许多北极熊在争食冲突中的侵略性比交配冲突中的侵略性强。 查看答案