皮皮学，免费搜题
登录
搜题
【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.
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】H+Li→2He属于______反应；U→Th+He属于______反应。
【单选题】He was socareful that not a mistake ________ in the test.
A.
he made
B.
he had ever made
C.
did he make
D.
he ever made
【简答题】北宋建立后,随着社会发展的要求,配合北宋新政权的统治要求,历史需要新思想,_________应运而生。
【单选题】我们中华民族遇到外敌入侵时,常常能把外敌打退,打不退的情况也很多,但却很难被征服。这个句子意在强调:我们中华民族
A.
虽然常常能打退外敌，却很难征服他们
B.
即使不能把外敌打退，也能够征服他们
C.
即使不能把外敌打退，也不容易被他们征服
D.
虽然有时不能打退外敌，却常常能征服他们
【单选题】He went to Valley Town _____ the morning of 28th November , but _____ the evening he was at his sister’s wedding . [ ]
A.
in , in
B.
on , in
C.
in , on
D.
in , at
【单选题】He told me that he arrived _______ Beijing _____ the morning of January 8th .
A.
at, in
B.
in, in
C.
in, on
D.
to, on
相关题目：