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In the GSM system, the propagation loss and distance have relationship.()

A. Logarithmic relationship

B.Exponential relationship

C.Linear relationship

D.Logarithmic and linear relationship

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第1题
在GSM系统中RACH信道是一种上行AOLH信道,为了提高RACH信道的效率,GSM规范中规定了移动台必
在GSM系统中RACH信道是一种上行AOLH信道,为了提高RACH信道的效率,GSM规范中规定了移动台必须采用的接入算法,该算法中应用了三个参数,即:发送分布时隙数、()、参数T及信道组合有关的参数S。

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第2题
In a periodic inventory system, the Cost of Goods Sold account may be created during t
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第3题
I began teaching at the James School twenty-two years ago when I was twenty -six.In th
ose days the place was very different.But time changes, and of course education theory changes, too.Methods and materials change.Even the classroom looks different.

Twenty years ago, our classroom was a lot less pleasant.Very old-fashioned.We had fewer window, for example.There were five rows of desks, six desks in a row.Since everything was nailed to the floor, a student sat in the same place all day long.Oh, we had to be very strict.Now students move all over the room.They go to different areas for different subjects, and they write at these movable desks.The students are more mobile, and beca use they’re more mobile, they’re less restless, and because they’re less restless, they are more attentive.At least that’s the theory.And as a matter of fact, we really don’t have many behavior. problems here.

We use a modified open classroom system here at the James.I’ll try to explain what that means.Each student makes a work contract with his teacher.Basically, he agrees to a certain amount of work on a certain project.He hands the work in when he gets it done.He works at his own speed and plans h is own time.If he is particularly motivated in one subject—math, for instance—he can explore the subject more thoroughly than the others.But he must also complete his contract in arts or reading or social science.Freedom within a structured system: that ’s what we are trying to offer.

1.Now, the author of this passage must be in his ().

A.20’s

B.30’s

C.40’s

D.50’s

2.Now we really do not have many behavior. problems in the classroom because().

A.the students are more mobile and attentive

B.the teachers are more strict

C.the teachers are less strict

D.the students are less attentive and restless

3.The main idea of the third paragraph is about().

A.the characteristic of the modified open classroom system

B.the characteristic of the work contract

C.the freedom of the students

D.the generosity of the teachers

4.In a modifie d open classroom system,().

A.the student needn’t do any home work

B.the student can get more freedom in their study

C.the subject that the student should learn is decided by the teacher

D.there is not any discipline that the student should obey

5.According to the author, the educational system today is().

A.more strict and attentive

B.more pleasant and efficient

C.is similar to the educational system twenty years age

D.is sa tisfied by every teacher and student

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第4题
GSM是()的英文缩写。

GSM是()的英文缩写。

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第5题
GSM系统的多址方式____________,双工方式__________。

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第6题
GSM系统所采用的调制技术是BPSK。()
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第7题
4) GSM系统使用的多址方式为_____________。

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第8题
1) GSM系统中定义了哪些逻辑信道?

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第9题
The normal cell maximum radius for GSM is?()

A.35km

B.70km

C.50km

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第10题
GSM属于第2代(2G)技术。

GSM属于第2代(2G)技术。

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