题目内容
如果一个软件是给许多客户使用的，大多数软件生产商要使用机制测试过程来发现那些可能只有最终用户才能发现的错误。（）测试是由软件的最终用户在一个或多个用户实际使用环境中进行的。
查看答案
搜索结果不匹配？点我反馈
更多问题
I did not know the city at all and, what is more, I couldn’t speak a word of the language. After having spent my first day sight-seeing in the town-center, I decided to lose my way deliberately on my second day, since I believed that this was the surest way of getting to know my way around. I got on the first bus that passed and descended some thirty minutes later in what must have been a suburb. The first two hours passed pleasantly enough. I discovered mysterious little book-shops in back streets and finally arrived at a market-place where I stopped and had coffee in an open-air calf. Then I decided to get back to my hotel for lunch. After walking about aimlessly for some time, I determined to ask the way. The trouble was that the only word I knew of the language was the name of the street in which I lived — and even that I pronounced badly. I stopped to asked a friendly-looking newspaper-seller. He smiled and handed me a paper. I shook my head and repeated the name of the street and he thrust the paper into my hands. Seeing that it would be impossible to argue about the matter, I gave him some money and went on my way. The next person I asked was an old lady who was buying vegetables. She was very hard of hearing and I repeated the word several times. When she finally heard me, she seemed to take offence and began shouting and shaking her walking-stick at me. I hurried away quickly and was relieved to see a policeman on a corner. He certainly would be able to help me. The policeman listened attentively to my question, smiled and gently took me by the arm. There was a distant look in his eyes as he pointed left and right and left again. He glanced at me for approval, and repeated the performance. I nodded politely and began walking in the direction he pointed. About an hour passed and I noticed that the houses were getting fewer and green fields were appearing on either side on me. I had come all the way into the country. The only thing left for me to do was to find the nearest railway-station! It can be inferred that ______.
To a router, a flow is a (1) of packets that share the same characterstics, such as traveling the same (2) , using the same (3) , having the same kind of security, and so on. A router that suppors the handling of flow labels has a (4) table. The table has an entry for each active flow label; each entry defines the (5) required by the corresponding flow label. 4（）
Questions 22-25 are based on the following dialogue between a librarian and a student. Why does the man mention that he is a new student at the school
Where do pesticides fit into the picture of environmental disease We have seen that they now pollute soil, water, and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to (26) the Contrary, is part of nature. Can he (27) a pollution that is now so thoroughly (28) throughout our world We know that even single exposures to these (29) , if the amount is large enough, can cause extremely severe (30) . But this is not the major problem. The sudden illness of death of farmers, farm workers, and others (31) to sufficient quantities of pesticides are very sad and should not (32) . For the population as a (33) , we must be (34) concerned with the (35) effects of absorbing small amounts of the pesticides that (36) pollute our world. (37) public health officials have pointed out that the biological effects of chemicals are (38) over long periods of time, and that the danger to the (39) may depend on the sum of the exposures (40) throughout his lifetime. For these very reasons the danger is easily (41) It is human (42) to shake off what may seem to us a threat of future disaster. "Men are naturally most impressed by diseases which have obvious signs," says a wise (43) , Dr. Rene Dubos, "yet some of their worst enemies slowly (44) them (45) .\
微信支付 
支付宝支付