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【单选题】
关于运输层的正确说法是A.
运输层的主要功能是实现网络主机之间的通信
B.
运输层提供可靠的数据传输服务
C.
运输层属于用户功能层次
D.
运输层属于面向通信的层次
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反馈参考答案：
举一反三
【判断题】The number of poles of the forward path transfer function at the origin is called the type number.
A.
正确
B.
错误
【简答题】编程实现:输出100以内7的倍数。
【判断题】The number of poles of the loop transfer function at the origin is called the type number.
A.
正确
B.
错误
【简答题】We may interpret the absolute value as being the number of units a given number is from the origin(原点), regardless of direction.
【简答题】写出100以内（包括100）17的倍数：___________________________
【判断题】The number of zeros of the forward path transfer function at the origin is called the type number.
A.
正确
B.
错误
【简答题】Why is there an increasing number of words of Latin and Greek origin in para. 7? Consult a dictionary for the meaning and origin of each of these words.
【简答题】We may interpret the absolute as being the number of units a given number is from the origin, regardless of direction.
【简答题】The number of explanations have been offered for its origin, but nobody knows the true story for certain.
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