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【单选题】
帧中继网络的虚电路建立在数据链路层，这种虚电路的特点是__（11）__。A.
没有流量控制功能，也没有拥塞控制功能
B.
没有流量控制功能，但具有拥塞控制功能
C.
具有流量控制功能，但没有拥塞控制功能
D.
具有流量控制功能，也具有拥塞控制功能
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【单选题】With an increase in world food production, people in Africa and Latin America today eat more food than they did a decade ago.
A.
Y
B.
N
C.
NG
【单选题】One of the most interesting paradoxes in America today is that Harvard University, the oldest institution of higher learning in the United States, is now engaged in a serious debate about what a unive...
A.
fight against militarism.
B.
take an active part in solving society’s evils.
C.
support old and established institutions.
D.
involve themselves in politics.
【单选题】No other holiday that is today widely observed in North America bas such a long and curious history as Thanksgiving. Throughout the Bible, there are references to the Israelites setting apart days for...
A.
the Bible records Israelites' celebration of Thanksgiving Day
B.
Thanksgiving Day originated from England
C.
people in England did not observe Thanksgiving Day until the reformation
D.
February 27, 1872 was the first Thanksgiving Day ever celebrated in the world
【单选题】Cultural Diversity in the Classrooms The classrooms in America today are changing in some significant ways such as students come from a variety of racial, cultural, linguistic, and economic background...
A.
Using video devices in class.
B.
Inviting parents to visit schools.
C.
Starting with what students have learned.
D.
Providing more examples for lectures.
【单选题】Television: The Cyclops That Eats Books What is destroying America today is not the liberal breed of politicians, or the International Monetary Fund bankers, misguided educational elite, or the World ...
A.
deal with violence
B.
face a sharp competition
C.
compete with rivals
D.
confront the reality of the world
【单选题】One of the most interesting paradoxes in America today is that Harvard University, the oldest institution of higher learning in the United States, is now engaged in a serious debate about what a unive...
A.
fight against militarism
B.
take an active part in solving society' s evils
C.
support old and established institutions
D.
involve themselves in politics
【单选题】Most small-business owners in America today have the characteristic of
A.
not granting paid vacation to employees.
B.
calling employees when on vacation.
C.
having regular holidays during a year.
D.
never having off-work recreational time.
【单选题】One of the most interesting paradoxes in America today is that Harvard University the oldest institution of higher learning in the United States, is now engaged in a serious debate about what a univer...
A.
fight against militarism.
B.
take an active part in solving society's evils.
C.
support old and established institutions.
D.
involve themselves in politics.
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