在常见的汽油发动机管理系统当中，当发动机的转速超过系统设定的最高转速时，系统将（），

辅料仓库分为平库和高架库，生产辅料物流供应发货依据分为，平库主要依据（）的要货清单出库，高架库根据（）的要料进行发货出库。

A.高架库、生产车间。

B.生产车间、高架库。

C.高架库、备货区。

D.备货区、生产车间。

保险利益是指投保人或者被保险人对保险标的具有的法律上承认的利益。它体现了投保人或者被保险人与保险标的之间存在的（）的利益关系。

A.权利上

B.金钱上

C.责任上

D.义务上

按（）来划分，房地产投资可分为政府投资、非盈利机构投资、企业投资和个人投资。

A.按投资主体

B.按投资期限或投资回收期长短

C.按经济活动类型

D.按投资对象存在形式的不同

The Internet is a way of life for US college students, with research showing them to be one of the most connected groups.

A recent study by Harris Interactive and 360 Youth found that 93 percent of American college students visit the Internet, and this market is expected to grow from 15.2 million in 2003 to 16.4 million in2007.

That is slow but could be the result of the already high number of college Internet users.

About 88 percent of American college students own a computer, and more than half have broadband connections. Furthermore, 76 percent own cell phones and 36 percent use their mobile devices to visit the Internet.

Study findings are that 42 percent go online mainly to communicate socially, and 72 percent of college students check emails at least once a day, with 66 percent using at least two email addresses.

The most popular online social activity is forwarding messages to friends or family, with 37 per cent of college students saying they do so.

The study also looked beyond the Internet surfing habits and into the buying habits of this group, and found them responsible for more than US＄210 billion in sales last year alone.

College students have learned how to spend their money, with 93 per cent saying low prices were important when shopping.

The study also showed that 65 percent make loan payments, 41 percent of freshmen have a credit card; and 79 percent of seniors have a credit card.

A significant number of charges on those credit cards are likely to be for entertainment and leisure expenses.

45. College students in the US, as this passage shows, _______

A. don’t have to learn their lessons in their classroom

B. spend too much time visiting the Internet

C. lead an exciting life by visiting the Internet

D. waste much time visiting the Internet

46. From the fourth paragraph we can find that in the US_______.

A. most college students are from rich families

B. college students can have a computer from their college

C. cell phones will take the place of computers in college

D. mobile phones make Internet life easy for college students

47. To communicate with friends, nearly half of the college students use_______

A. letters        B. e-mails       C. telephones          D. telegraph

48. By using the Internet, college students in the US can do the following except _______.

A. reading newspapers              B. chatting with friends

C. buying goods                  D. going swimming

船舶电力推进的控制系统通常由三层控制网络组成，它们是：管理层、设备层和（）。

A.I/O层

B.现场总线

C.控制层

D.变频器