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【单选题】
（12）处填入（）。
A．again
B．thus
C．repeatedly
D．yet
A.
In the United States, the first day nursery was opened in 1854. Nurseries were established in various areas during the (1) half of the 19th century; most of (2) were charitable. Both in Europe and in the U. S. , the day-nursery movement received great (3) during the First World War, when (4) of manpower caused the industrial employment of unprecedented numbers of women. In some European countries nurseries were established (5) in munitions (军火)plants, under direct government sponsorship. (6) the number of nurseries in the U.S. also rose (7) , this rise was accomplished without government aid of any kind. During the years following the First World War, (8) , Federal, State, and local governments gradually began to exercise a measure of control (9) the day nurseries by (10) them and by inspecting and regulating the conditions within the nurseries.
B.
The (11) of the Second World War was quickly followed by an increase in the number of day nurseries in almost all countries, as women were (12) called upon to replace men in the factories. On this (13) the U. S. government immediately came to the support of the nursery schools, (14) $6,000,000 in July, 1942, for a nursery school program for the children of working mothers. Many States and local communities (15) this Federal aid. By the end of the war, in August, 1945, more than 100,000 children were being cared (16) in day-care centers receiving Federal (17) Soon afterward, the Federal government (18) cut down its expenditures for this purpose and later (19) them, causing a sharp drop in the number of nursery schools in operation. However, the expectation that most employed mothers would leave their (20) at the end of the war was only partly fulfilled.
C.
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【单选题】6（） A.poses B.produces C.makes D.brings
A.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
【单选题】Text 1 While it is generally agreed that the power of large companies extends beyond the economic sphere, this influence is difficult to measure in any objective way. The processes of business entail...
A.
The power of large companies is usually confined in the economic sphere.
B.
The operations of large companies are thoroughly controlled by government regulations.
C.
It is illegal for any large company to influence the enforcement of legislation.
D.
Large companies cannot be free from the influence of political processes.
【多选题】下列叙述正确的是()。
A.
单位重量液体从某一基准面算起所具有的位能称为单位位能
B.
静止液体中任一点的单位位能和单位势能之和，即任一点的单位重量液体所具有的总势能相等
C.
静止液体中任一点的位置水头与压强水头之和，即测压管水头为常数
D.
液体静力学基本方程中的各项，从量纲来看都是长度
【单选题】The onset of a new generation of computer attacks was marked by （） A. an organization of gangs B. the infection of PCs C. the sale of a software D. a website’s vanishing
A.
The "MyDoom" virus could presage a generation of computer attacks by organised gangs aiming to extract ransoms from online businesses, experts said yesterday.
B.
The warning came as the website run by SCO, a company that sells Unix computer software, in effect disappeared from the web under a blizzard of automated attacks from PCs infected by the virus, which first appeared a week ago.
C.
The "MyDoom-A" version of the virus is reckoned to be the worst to have hit the internet, in terms of the speed of its spread, with millions of PCs worldwide believed to be infected. Such "zombie" machines begin to send out hundreds of copies of the virus every hour to almost any e-mail address in their files.
D.
On Sunday they began sending automated queries to SCO’s website, an attack that will continue until 12 February. The attack is the web equivalent of ringing the company’s doorbell and running away a million times a second, leaving its computers unable to deal with standard requests to view its pages.
E.
"You have to wonder about the time limit," said Graham Cluley, senior technology consultant at the antivirus company Sophos. "Someone could go to SCO after the 12th and say, ’If you don’t want this to happen again, here are our demands’." Raimund Genes, European president of the security software firm Trend Micro, said: "Such a programme could take out any major website on the internet. It’s not terrorism, but it is somebody who is obviously upset with SCO"
F.
SCO has earned the enmity of computer users through a lawsuit it has filed against IBM. SCO claims ownership of computer code it says IBM put into the free operating system Linux, and is demanding licence fees and damages of $1bn.
G.
Mr. Cluley said: "It might be that whoever is behind this will say to SCO, ’if you don’t want the next one to target you, drop the lawsuit’." SCO has offered $250,000 (￡140,000) for information leading to the arrest of the person or people who wrote and distributed MyDoom.
H.
Nell Barrett, of the security company Information Risk Management, said, "I would give a lot of credence to the idea of gangs using viruses to extort money. It’s hard for law enforcement to track them down, because they’re using machines owned by innocent people."
I.
A second variant of MyDoom will start attacking part of Microsoft’s website later today. The antivirus company MessageLabs said it had blocked more than 16 million copies of the virus in transit over the net so far. But millions more will have reached their targets.