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【简答题】
(1)什么叫发送时延? (2)什么叫传播时延? (3)如果收发两端之间的传输距离为 10km ,信号在媒体上的传输速率为 2.0 × 10 5 km/s ,数据长度为 1000B ,数据发送速率为 100kbit/s ,试计算它的发送时延和传播时延。
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【单选题】()多为混凝土收缩引起的表面龟裂。裂缝细小，宽度约为 0.03～0.05mm ，用手触 及有凸起感觉，并无固定规律。
A.
网状裂缝
B.
下缘受拉区的裂缝
C.
梁肋上的竖向裂缝
D.
梁肋上的斜裂缝
【单选题】Why does the author fight with her boyfriend?
A.
Because they haven't seen each other for a long time.
B.
Because he does't love her any longer.
C.
Because he doesn't send emails to her frequently.
D.
Because their typed dialogue lack of emotional cues and she misinterprets it.
【简答题】Why does the woman want to move out? ' [A] Because she does not get along with her brother. [B] Because her parents treat her badly. [C] Because she wants to be independent. [D] Because she quarreled ...
【单选题】Why does the librarian ask the student about her favorite videos?
A.
To show her interest in him.
B.
To do a survey.
C.
To complete the procedure.
D.
To help him find a video.
【单选题】Why does the woman want to move out?
A.
Because she does not get along with her brother.
B.
Because her parents treat her badly.
C.
Because she wants to be independent.
D.
Because she quarreled with her parents.
【单选题】Why does the man call the woman ?
A.
To tell her about her new job
B.
To ask about her job program
C.
To plan a meeting with her.
【简答题】因报道“泰坦尼克号”事件而出名的报人是（）
【单选题】听力原文：Why does the speaker mention that her husband does all the ironing in their house? (35)
A.
To share with others her experience.
B.
To show her husband.
C.
To prove a previous point.
D.
To show her abilities.
【简答题】因报道“泰坦尼克号事件”而出名的报人是____(3个字人名)
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