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第二节 根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并将答案填写在本题下面的横线上。选项中有两项多余选项。（共5小题；每小题2分，满分10分） Purser: Excuse me, have you filled out your customs declaration form yet? Han: No, I haven’t. ___1____ Purser: Yes._____2______ Han: Thanks...It looks rather complicated. Purser:___3____ ---the Prohibited Articles List and the Duty-Free Quota List. Right.Here. Han: I have nothing but personal belongings. Purser:_____4__. But please go over the lists to make sure that you have nothing to declare. Han: All right. We seem to be standing still. Purser: ____5____. We’ve waiting for the quarantine (防疫)and immigration(移民) officers to come on board to check the passport and health certificates. There they are now, on that launch. Han: Well, I’d better hurry and get ready to go ashore. Thank you. A．In that case, just put down “personal effects”. B．I can help you. Please look through the two lists. C．Am I to fill it out before we land? D．I’d better hurry now. E.Here’s a form for you, sir. F.The ship is docking(靠码头) soon. G.What can I do with all my belongings?
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【单选题】在层次网络体系结构中，第n层协议利用(2)提供的服务向(3)提供服务，对等实体是指(4)，数据在同一个系统自上层传到下层，这种数据格式称为(5)，某层实体接收到上层传来的数据后，一般要(6)才能使接收方知道如何处理。
A.
(n+1)层协议
B.
n层协议
C.
(n-1)层协议
D.
物理层
【单选题】Which of the following best describes the way the last paragraph functions in the context of the passage?
A.
The last in a series of arguments supporting the central argument of the passage is presented.
B.
A viewpoint is presented which qualifies one presented earlier in the passage.
C.
Evidence is presented in support of the argument developed in the preceding paragrap.
D.
Questions arising from the earlier discussion are identified as points of departure for further study of the topic.
E.
A specific example is presented to illustrate the main elements of argument presented in the earlier paragraphs.
【单选题】Which sentence proves that setting the giant reflector is a delicate operation?
A.
The first sentence in the last paragraph.
B.
The second sentence in the last paragraph.
C.
The last sentence in the last paragraph.
D.
The last sentence in the third paragrap
【单选题】根据下面的文字资料回答 21～25 题 在网络体系结构中，第N层协议利用（ 1 ）提供的服务向（ 2 ）提供服务，对等实体是指（ 3 ），数据在同一个系统自上层传到下层，这种数据格式称为（ 4 ），某层实体接收到上层传来的数据后，一般要（ 5 ）才能使接收方知道如何处理。 第21题：文中（ 1 ）处正确的答案是（ ）。
A.
(N+1)层协议
B.
N层协议
C.
(N一1)层协议
D.
物理层
【简答题】What does the author mean by the question 'why should anyone applaud' in the last paragraph?
【简答题】●在网络体系结构中，第N层协议利用 (24) 提供的服务向 (25) 提供服务，对等实体是指 (26) ， 数据在同一个系统自上层传到下层，这种数据格式称为 (27) ，某层实体接收到上层传来的数据后，一般要 (28) 才能使接收方知道如何处理。 (24) A．(N＋1)层协议 B．N 层协议 C．(N－1)层协议 D．物理层 (25) A．(N＋1)层协议 B．N 层协议 C．(N－1)层协议 ...
【简答题】简答题:网络层数据实体提供如下的服务
【单选题】在网络体系结构中，第N层协议利用(24)提供的服务向(25)提供服务，对等实体是指(26)，数据在同一个系统自上层传到下层，这种数据格式称为(27)，某层实体接收到上层传来的数据后，一般要(28)才能使接收方知道如何处理。
A.
(N+1)层协议
B.
N层协议
C.
(N-1)层协议
D.
物理层
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