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【单选题】
关于施工形象进度、产值统计、实际成本三者关系的说法,正确的是( )。A.
施工形象进度、产值统计、实际成本所依据的工程量应是相同的数值
B.
施工形象进度与产值统计所依据的工程量是相同的，但与实际成本计算依据的工程量不同
C.
施工形象进度、产值统计、实际成本所依据的工程量都是互不相同的
D.
产值统计与实际成本所依据的工程量是相同的，但不同于形象进度计算所依据的工程量
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【单选题】下列关于集线器的描述中,错误的是( )。
A.
集线器基于MAC地址完成数据帧转发
B.
连接到集线器的结点发送数据时采用 CSMA/CD算法
C.
通过在网络链路中串接一个集线器可以监听该链路中的数据包
D.
连接到一个集线器的所有结点共享一个冲突域
【单选题】听力原文：W: Hello! Can I speak to Tom? M: This is Tom speaking. Q: What are they doing? (21)
A.
They are working in the office.
B.
They are talking on the phone.
C.
They are playing in the school.
【单选题】下列关于集线器的描述中,错误的是( )。
A.
连接到集线器的节点发送数据时,所有节点都能收到
B.
连接到集线器的节点发送数据时,将执行CSMA/CD介质访问控制方法
C.
通过在网络链路中串接一个集线器可以监听该链路中的数据包
D.
集线器是基于MAC地址识别完成数据转发的
【单选题】听力原文：M: Hi, Sally. W: Hello, Tom. How are you? M: I'm fine. Where are you going? W: Oh, I'm on my way home from work. M: I didn't know you had a job. W: Yes, I work part-time at a supermarket. M: What...
A.
Working at the meat counter.
B.
Working in the produce section.
C.
Carrying groceries out of the store for customers.
D.
Checking the quality of the milk products.
【单选题】下列关于集线器的描述中,错误的是()。
A.
通过在网络中增加一台集线器，IDS连接在该集线器上可以获取和分析数据包。
B.
通过在网络链路中串接一个集线器可以监听该链路中的数据包
C.
连接到一个集线器的所有结点共享一个冲突域
D.
集线器是基于MAC地址识别完成数据转发的
【单选题】听力原文：M: Hi, Sally. W: Hello, Tom. How are you? M: I'm fine. Where are you going? W: Oh, I'm on my way home from work. M: I didn't know you had a job. W: Yeah, I work part-time at a supermarket. M: Wha...
A.
Working at the meat counter.
B.
Working in the produce section.
C.
Carrying groceries out of the store for customers.
D.
Checking the quality of the milk products.
【单选题】听力原文：M: Hi, Sally. W: Hello, Tom. How are you? M: I'm fine. Where are you going? W: Oh, I'm on my way home from work. M: I didn't know you had a job. W: Yeh, I work part-time at a supermarket. M: What...
A.
Working at the meat counter.
B.
Working in the produce section.
C.
Carrying groceries out of the store for customers.
D.
Checking the quality of the milk products.
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