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【单选题】
已知: class A { public: int a; int b(); int f(); int f(int); int g(); }; class B { public: char f(); int g(); private: int a; int b(); }; class C:public A,public B { }; 设有: C *pc; 则:A.
pc->a 存在二义性。
B.
pc->b() 存在二义性
C.
pc->f(10) 存在二义性。
D.
c->g() 存在二义性。
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举一反三
【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】听力原文：M: I hope it'll be fine tomorrow. I'm going boating with Tom. W: Oh, I think it will be fine. M: Are you sure? W: Yes. I heard it on the radio. What are the two speakers talking about?
A.
A fine boat.
B.
Their friend, Tom.
C.
The weather.
【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】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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