下面几种业务类型中，属于BE业务的是（）

A:Conversational B:CSStreaming C:PSStreaming D:Interactive

在TD-SCDMA系统中，根据业务的质量要求（QOS），划分为如下哪些类型的业务（）

A:conversational B:streaming C:interactive D:background

[Focus on a conversational principle]（）

A:quantity B:manner C:approbation D:quality

[Focus on the properties of conversational implicature]（）

A:indeterminacy B:calculability C:defeasibility D:interestingness

By （） is meant that a conversational implicature is attached to the semantic content of what is said, not to the linguistic form.

non-detachability

What are the four maxims of the Cooperative Principle Exemplify how the violation of these maxims gives rise to conversational implicature.

The four maxims of Cooperative Principle are: QUANTITY, QUALITY, RELATION, and MANNER.
A)A: What are you reading
B: A book.
A knows B is reading a book, and is asking about the content of the book. Simply by saying "a book", B is not offering enough information. The implicature here is: I do not want to talk to you right now. In this case, the maxim of QUANTITY is violated.
B)He is made of iron.
Our common sense tells us no human being is made of iron. Obviously this is a false statement and has violated the maxim of QUALITY. The implicature here is: he is as strong as iron.
C)A: Mrs. Smith was such a bore at the party last night.
B: It’s really chilly here. I want to go out to warm up.
When A is talking about Mrs. Smith, B turns to talk about something totally irrelevant. Therefore the maxim of RELATION is violated. The implicature here is: It is impolite to say that.
D)a. Miss Smith sang "Home sweet home".
b. Miss Smith produced a series of sounds that corresponded closely with the song of "Home sweet home".
The two sentences actually are basically talking about the same thing. But sentence b is stated in such a way that makes it more obscure for the audience and therefore violates the maxim of MANNER. The implicature here is: Miss Smith does not sing well and I do not like her singing.

The theory of conversational implicature Was proposed by ______.

Herbert Paul Grice

One of the characteristics of conversational implicature is CANCELLABITITY. What is the basic working principle of CANCELLABILITY How can we use it to make our meaning well expressed

CANCELLABITITY is also known as DEFEASIBILITY. The presence of a conversational implicature relies on a number of factors: the conventional meaning of words used, the CP, the linguistic and situational contexts, etc. For example,
a. John has three cows.
b. John has only three cows.
c. John has three cows, if not more.
d. John has at least three cows.
So if any of them changes, the implicature will also change. For example, sentence (a) usually implicates (b). But if we add "if not more" to (a), to change it to (c), then the previous implicature (b) is cancelled, or defeated. And (c) means (d).
In the case of the reference letter, if the writer adds "though I don’t mean he’s not good at philosophy", then the original implicature is no longer there. The example of Premier Zhu’s speech at MIT also shows that implicatures can be cancelled by additional clauses.
A conversational implicature may even be cancelled simply by the situational context. If "to have three cows" is a condition for anyone to get a subsidy from the government, then when the inspector asks John’s neighbor (e), he could very well answer (f), without implicating (b).
e. Has John really got the requisite number of cows
f. Oh sure, he’s got three cows all right.
Again in the case of the reference letter, if the student is applying for a lectureship in English, then this letter becomes a favorable comment.

When a number of people ______ together in a conversational knot, each individual expresses his position in the group by where he stands.

A:pad B:pack C:squeeze D:cluster