单项选择题

Nowadays nearly everyone has suffered from a bad attack of forgetfulness when a password is needed.
The company computer. The home computer. Banking and ATM machines. Websites. Car and home security systems. The list goes on. It does not take long to accumulate a dozen or more passwords.
Scribbling them down on slips of paper or simply using the same password for anything and everything is how most people cope with the overload. The negative aspect of this is that either way makes it easier for hackers to invade computer privacy.
Researchers are now trying to do something about this by moving forward what may be an answer to the password puzzle-pictures.
What does the writer mainly talks about in the first three paragraphs

A. Why people are so forgetful in the computer era.
B. what happens when many passwords are needed.
C. Why hackers can easily invade computer privacy.
D. What people usually do to solve the password puzzl
<上一题 目录 下一题>
热门 试题

单项选择题
There weren’t any surprises there. The surprise I had was standing on the surface after we’d been there for a few minutes, having a chance to rest a little bit, and looking up at the earth for the first time-you have to look up because that’s where it is. And the sky is totally black, and here you have a planet which is four times the size of the moon as we look at it from the earth, and you also have color. You have a blue ocean and the brown landmasses-the brown continents-and you can see ice on the ice caps on the North Pole, and so on. The speaker was mostly probably talking his experience
A. on the high mountain.
B. under the ocean water.
C. in an airplane.
D. on the surface of the moon,
单项选择题
Thomas Edison was awarded more patents on inventions than any other American. When he died in 1931, Americans wondered how they could best show their respect for him. One suggestion was that the nation observe a minute or two of total blackout. All electric power would be shut off in homes, streets, and factories. Perhaps this suggested plan made Americans realize fully what Edison and his inventions meant to them. Electric power was too important to the country. Shutting it off for even a short time would have led to complete confusion. A blackout was out of the question. On the day of Edison’s funeral, many people silently dimmed their lights. In this way they honored the man who had done more than anyone else to put the great force of electricity at his countrymen’s fingertips. In order to honor Edison, many Americans dimmed their lights
A. all the year of 1931.
B. on the day of Edison’s funeral.
C. a few days around Edison’s funeral.
D. for one or two minutes.
相关试题