皮皮学,免费搜题
登录
搜题
【简答题】
In the computer age, most of us take a broadband(宽带)Internet connection for granted. Whether cable or mobile broadband, today’s connections are many times faster than those in the early days. Videos play smoothly, complex websites load quickly, and files download much faster than ten years ago. And the files are much bigger too. There’s a catch , of course: You have to live near enough to a major city to get broadband Internet. If you don’t, it’s slow dial-up access for you. And for those living really far out, there may be no Internet access at all. Technology experts often talk about the “last mile” problem, which refers to the difficulty of bringing Internet access to remote locations. In cities and suburbs, it’s relatively easy to provide access for everyone. It is much more difficult to deliver access to those living far from cities, especially in developing countries. Internet service providers, for their part, have been reluctant to provide access to sparsely (稀疏地) populated areas. The handful of Internet users they would reach wouldn’t cover the expense. But every year, technological advancements allow of more and more Internet users. Most broadband connections today run over existing cable TV and telephone lines although these technologies aren’t available everywhere. Some companies have delivered the Internet over standard power lines. Advancements in cheaper, more efficient fiber optics cables (光纤电缆) promise to bring extremely fast Internet connections to more users. Still, the “last mile” problem remains hard to deal with. There will always be somewhere that doesn’t have an affordable broadband connection. But someday that might not matter. If the rapid progress in cell phone technology is any indication (迹象), it may not be too long before an Internet connection simply follows you wherever you go. 小题1:The underlined part “a catch” (in Paragraph 2) probably means “_____”. A.a rare challenge B.a desirable plan C.an efficient device D.a hidden problem 小题2:What can we know from the third paragraph? A.Internet connection has not been popular in most cities. B.Internet service providers care about rural(农村的)customers. C.Computer is popular in developing countries. D.It is hard to bring Internet access to users in remote areas. 小题3:Paragraph 4 mainly tells us that technological advancements _____. A.make TV and telephone available everywhere B.bring great change to people’s everyday life C.make it possible for more people to use the Internet D.bring faster Internet connections to users 小题4:What may eventually settle the “last mile” problem? A.The broadband connection’s getting faster. B.More and more Internet users. C.more and more Internet connections. D.The rapid progress in cell phone technology.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】与细菌致病性无关的物质是:
A.
毒素
B.
热原质
C.
侵袭性酶
D.
细菌素
E.
透明质酸酶
【判断题】学术规范是根据学术发展规律制定的有关学术活动的基本准则,反映了学术活动长期积累的经验。()
A.
正确
B.
错误
【单选题】下列哪种药物不是脱水利尿剂
A.
20%甘露醇
B.
利尿酸钠
C.
速尿
D.
11.2%乳酸钠
E.
尿素
【多选题】胃肠激素的生理作用是
A.
调节消化腺分泌
B.
调节消化道运动
C.
调节其他激素的释放
D.
促进水盐代谢
E.
促进消化系统组织的生长
【多选题】胃肠激素的生理作用是
A.
 调节消化腺分泌
B.
 调节消化道运动
C.
 调节其他激素的释放
D.
 促进水盐代谢
【判断题】数字证书包含证书持有人、个人信息、公开密钥、证书序列号、发证单位的电子签名等,但不包括有效期。
A.
正确
B.
错误
【单选题】与细菌致病性无关的物质是:
A.
菌毛
B.
荚膜
C.
异染颗粒
D.
脂多糖
E.
侵袭性胞外酶
【多选题】胃肠激素的生理作用是
A.
调节消化腺分泌
B.
调节消化道运动
C.
调节其他激素的释放
D.
促进消化道生长
【单选题】PDI检查项目:车身漆面检查:掉漆是由于( )作用造成的漆膜脱落。
A.
外力
B.
工艺不良
C.
油漆质量不良
D.
附着力
【判断题】我国第一个五年计划是在1953年开始的。
A.
正确
B.
错误
相关题目: