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根据下面的文字资料回答 68～72 题For each blank．choose the best answerfrom the four choices and write down on the answer sheet．
（ 1 ）is a protocol that a host uses toinform. a router when it joins or leaves an Internet muhicast group．
（ 2 ） is an error detection code that most data communication networks use．
（ 3 ）is an interior gateway protocol that uses a distance vector algorithm topropagate routing information．
（ 4 ）is a transfer mode in which all types of information ate organized intofixed form. cells onan asynchronous or non－periodic basis over a range of media．
（ 5 ）is an identifier of a web page．
第68题：文中（ 1 ）处正确的答案是（ ）。
A．SMTP
B．ICMP
C．RARP
D．IGMP
参考答案
更多 “ 根据下面的文字资料回答 68～72 题For each blank．choose the best answerfrom the four choices and write down on the answer sheet．（ 1 ）is a protocol that a host uses toinform. a router when it joins or leaves an Internet muhicast group．（ 2 ） is an error detection code that most data communication networks use．（ 3 ）is an interior gateway protocol that uses a distance vector algorithm topropagate routing information．（ 4 ）is a transfer mode in which all types of information ate organized intofixed form. cells onan asynchronous or non－periodic basis over a range of media．（ 5 ）is an identifier of a web page．第68题：文中（ 1 ）处正确的答案是（ ）。A．SMTPB．ICMPC．RARPD．IGMP ” 相关考题
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请教:2009年11月北京地区成人英语三级考试(A)卷第2大题第1小题如何解答?
【题目描述】
Directions: In this part there are 30 incomplete sentences. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence. Then blacken the corresponding letter on the Answer Sheet.
16. The driver was at ____ loss when ____ word came that he was forbidden to drive for speeding.
A a;/
B a;the
C the;the
D /;/
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It beingB
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