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【单选题】
听力原文：W: Welcome, Mr. Johnson. Take a seat, please. Our manager will be back soon. M: Thank you. Urn, it's rather warm these days, isn't it? W: Yes. The weather is quite unusual at this time of year. M: You're right. Er...do you mind if I take off my jacket then? W: Sure. Make yourself at home. M: Thank you, that's better. Urn...do you mind if I smoke? I notice nobody's smoking around here. W: Well, I'm sorry, but this is a non-smoking office building. M: Oh, that's OK. I'm trying to quit it anyway. By the way, may I use your phone to book a table... for lunch? W: Yeah. Sure. Do you know which restaurant is good? M: Oh, yeah, absolutely. W: Fine. The phone is over there. M: Thank you. Question 8: What's the most probable relationship between the two speakers? (15)A.
Doctor and patient.
B.
Manager and clerk.
C.
Secretary and visitor.
D.
Teacher and student.
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举一反三
【单选题】若带头结点的单链表的表头指针为head，则该单链表为空的判定条件是（）。
A.
head==NULL
B.
head->next=NULL
C.
head!=NULL
D.
head->next=head
【简答题】MSTP 是指基于SDH，同时实现对TDM、（）和（）等多种业务的接入、处理和传送的平台。
【单选题】某带头结点的单链表的头指针为 head ,判定该链表为空的条件是 ( )
A.
head==NULL
B.
head->next==NULL
C.
head!=NULL
D.
head->next!=NULL
【单选题】耳聋助听器第一级放大电路在测试时，用示波器观察输入输出波形，其中输入和输出波形相位关系正确的是（ ）。
A.
同相
B.
相差90°
C.
相差180°
D.
相差360°
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