[填空题]Any two networks in piconets is unlikely be on the same frequency at the same time because each network ______ thousands of times a second.

[填空题]Any two networks in piconets is unlikely to be on the same frequency simultaneously because each network is changing its______ thousands of times a second.

[填空题]Any two networks in piconets is unlikely be on the same frequency at the same time because each network ______ thousands of times a second.

[简答题]Could you please name any two of Daniel Jones’ works on English phonetics

[单项选择]Text 4 Your dog is as smart as any two year old, according to a new study. Dogs bring much happiness to their owners, and even improve human health. Most two year olds keep us busy in life - an important part of living a long and happy life. According to Stanley Coren, Ph. D. of the University of British Columbia, our dogs are smarter than we thought. Dr. Coren reviewed many studies to find out that dogs are as smart as 2 to 2.5 year olds. Forget about one word orders - according to Coren, the smartest dogs can learn up to 250 words. Most dogs understand an average of 165 words. “The upper limit of dogs, ability to learn language is partly based on a study of a Border Collie (博得牧羊犬) named Rico who showed knowledge of 200 spoken words，and ‘fast-track learning,’ which scientists believed to be found only in humans and language-learning apes (猿).” Dogs are also great at tricking. During play, they have the ability to trick humans and other dogs in order to get treats. “And they are nea
A. By doing funny tricks.
B. By keeping humans busy.
C. By serving their owners.
D. By playing with their owners.

[单项选择]The connection between two networks to form an internet is handled by a machine known as a ______.
A. bridge
B. client
C. router
D. switch

[单项选择]Passage Two Any discussion of English conversation, like any English conversation, must begin with The Weather. And in this spirit of observing traditional protocol, I shall quote Dr Johnson’s famous comment that "When two English meet, their first talk is of the weather", and point out that this observation is as accurate now as it was over two hundred years ago. This, however, is the point at which most commentators either stop, or try, and fail, to come up with a convincing explanation for the English “obsession” with the weather. They fail because their premise is mistaken: they assume that our conversations about the weather are conversations about the weather. In other words, they assume that we talk about the weather because we have a keen interest in the subject. Most of them then try to figure out what it is about the English weather that is so fascinating. Bill Bryson, for example, concludes that the English weather is not at all fascinating, and presumably t
A. misleading
B. incorrect
C. absurd
D. biased

[填空题]The confusion in piconets will ______ merely a tiny fraction of a second.