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【简答题】
Suppose users share a 2 Mbps link. Also s uppose each user transmits contin- uously at 1 Mbps when transmitting, but each user transmit s only 20 percent of the time. suppose packet switching is u sed, f ind the probability that a given u ser i s transmitting.
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参考答案:
举一反三
【单选题】正常的胃泡区叩诊音是
A.
鼓音
B.
清音
C.
过清音
D.
浊音
E.
实音
【单选题】为50mm的镀锌钢管标注形式为( )。
A.
De50
B.
DN50
C.
d 50
D.
50
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【单选题】“认识正方体、长方体、球体和圆柱体,能正确说出名称。”这一教育要求适于( )
A.
托班
B.
小班
C.
中班
D.
大班
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【简答题】Directions: Complete the following sentences with the proper form of the words given in brackets by adding im- dis- re- to the words or removing them from the words. 1. I don't (call)___seeing any ca...
【单选题】正常的胃泡区叩诊音是
A.
清音
B.
鼓音
C.
浊音
D.
过清音
E.
实音
【简答题】数控机床会坏吗?
【多选题】他励直流电动机的制动有
A.
能耗制动
B.
反接制动
C.
回馈制动
D.
正接制动
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