正确答案: BCDE

最底层是数据链路层 最高层是主机-网络层 传输层的上层是网络层 物理层的下层是传输层

题目：关于OSI参考模型层次的描述中，错误的是

解析：OSI参考模型即七层模型，从下到上依次是物理层、数据链路层、网络层、传输层、会话层、表示层、应用层。主机-网络层是TCP/IP协议中的最底层，最高层是应用层。根据解析，选项BCDE错误，根据题意，故选择BCDE选项。

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举一反三的答案和解析：

[单选题]“黑客”的行为是()。

不道德的、违法的

解析：答案：C

[单选题]下面那一项不是风险评估的目的?

完全消除组织的风险

解析：答案：D

[单选题]基于一般的离散对数困难性的公钥算法是()。

Elgamal

[单选题]

B． 5 C． 10 D． 40

4B． 5

解析：解析：码距是任意两个合法码之间至少有几个二进制位不同，所以它们的码距是5，可纠正5-1即4个错误。

[单选题]下面对于招标过程按顺序描述，正确的是(36)。

招标、投标、开标、评标、决标、授予合同

解析：解析：本题主要考查考生对招投标法的了解，正确的排列顺序是招标、投标、开标、评标、决标、授予合同，本题的正确答案是B，其他的都不符合逻辑。

[多选题]● Observe that for the programmer, as for the chef, the urgency of the patron（顾客） may govern the scheduled completion of the task, but it cannot govern the actual completion. An omelette（煎鸡蛋）, promised in two minutes, may appear to be progressing nicely. But when it has not set in two minutes, the customer has two choices—waits or eats it raw. Software customers have had （71） choices.Now I do not think software （72） have less inherent courage and firmness than chefs, nor than other engineering managers. But false （73） to match the patron's desired date is much more common in our discipline than elsewhere in engineering. It is very （74） to make a vigorous, plausible, and job risking defense of an estimate that is derived by no quantitative method, supported by little data, and certified chiefly by the hunches of the managers.

no

the same

other

lots of

testers

constructors

managers

architects

tasks

jobs

works

scheduling

easy

difficult

simple

painless

sharing

excluding

omitting

ignoring

解析：B,C,D,B,A