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【单选题】
Part B Listening Comprehension Directions: In this part of the test there will be some short talks and conversations. After each one, you will be asked some questions. The talks, conversations and questions will be spoken ONLY ONCE. Now listen carefully and choose the right answer to each question you have heard and write the letter of the answer you have chosen in the corresponding space in your ANSWER BOOKLET. 听力原文:W: Hello, Andrew, I believe you want to know about visiting hours? M: Yes, I do, Mrs. Lam. I have to fill out this form, and I'd like to have some idea why the different parts of the hospital have different times for visiting. W: I see, well, let's start with an obvious one. Intensive Care. People in intensive care are very sick indeed, and for that reason we say that visitors can come between 6 am and midnight. M: I can understand that. W: At the other end of the scale, our maternity patients are usually quite well, but we restrict their visiting hours from 8 am to 8 pm. We find they get very tired if we permit visitors all the time. M: I see, what about the surgical wards? W: The doctors prefer to do their rounds early in surgical, so visiting hours are 9 am to 9 pm. Surgical patients are often on very heavy painkillers, and they aren't really very good company for their visitors! M: But surely the visitors come to cheer up the patient, not the other way round? W: Of course. And often the visitors are able to help the patient a lot. That's why we allow visitors all day, the full 24 hours, in the emergency ward. They help comfort the patient while they're waiting to be diagnosed. Of course, it's not just everyone who can visit a sick patient. People in intensive care can only be visited by their immediate family. What's more, we only allow two people in at any time. We let children of the immediate family in to visit people in intensive care, but we don't like to do it. It's very hard on the children, an it may distress the patient. However, if the patient asks for the child, and the family agrees, that's okay. M: What about children in maternity? W: Of course we let them in! They're very pleased to see their mothers. The rule in maternity is everyone may visit, up to six people at a time. The maternity ward is quite sociable, after all. M: The surgical ward must be different. W: It is indeed. We don't allow children in the surgical ward because of the danger of infection, and as you know we restrict the hours. There are a lot of procedures which must be carried out on surgical patients, and we only let two visitors come in at a time. M: And in Emergency, people are allowed to visit all the time? W: Oh, yes, we rely on patients' relatives to be there for them, and we permit everyone to visit the emergency department at all hours. However, we restrict it to three visitors for each patient. Otherwise the room just gets totally crowded. W: Now I have your schedule for the next week's observation sessions, are you ready? M: Yes. Where do I start? W: On Monday you will be in male surgical in the morning, and in female surgical in the afternoon. You'll be following Dr. Shay on her rounds. M: Thank you. And on Tuesday? W: On Tuesday you will be with Dr. Thomas in the morning and Dr. Robertson in the afternoon. No, that can't be right.., you are with Dr. Thomas in the afternoon and Dr. Robertson in the morning. M: Do I ever get to see Dr. Kim? W: Yes, you will be with Dr. Kim on Thursday and Friday. She' 11 take you through the children's ward and through our new teenage ward for 12 to 15 year olds. M: Great! I've read a lot about that new ward. Will I see the school room? W: Maybe another time. Questions: 1.When can visitors come to Intensive Care? 2.Why do hospitals limit the visiting hours of maternity patients? 3.Who can visit patients in Intensive Care? 4.Which statement is NOT true about the visits in Emergency? <
A.
From 6 am to 6 pm.
B.
From 9 am to 9 pm.
C.
From 6 am to midnight.
D.
All day.
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【多选题】设【图片】为【图片】阶矩阵,且【图片】与【图片】相似,【图片】为【图片】阶单位矩阵,则下列说法正确的是( ).
A.
B.
与 有相同的特征值
C.
与 相似于一个对角矩阵
D.
对任意常数 t , 与 相似
【单选题】设4阶实矩阵A对称,满足【图片】,且【图片】,则与A相似的对角阵个数为( )
A.
6
B.
4
C.
3
D.
2
【单选题】休克指数判断正确的是
A.
>0.5表示有休克,>1.0为严重休克
B.
05~15表示有休克,>15为严重休克
C.
1.0~1.5表示有休克,>1.5为严重休
D.
>1.0~1.5表示有休克,>2.0为严重休克
E.
>1.5表示有休克,>2.0为严重休克
【判断题】设A,B为n阶矩阵,且A与B相似,则【图片】.
A.
正确
B.
错误
【单选题】休克指数的判断正确的是
A.
>0.5表示有休克,>1.0为严重休克
B.
0.5~1.5表示有休克,>1.5为严重休克
C.
1.0~1.5表示有休克,>1.5为严重休克
D.
>1.0~1.5表示有休克,>2.0为严重休克
E.
>1.5表示有休克,>2.0为严重休克
【单选题】一个负载 R L 经理想变压器接到信号源上,已知信号源的内阻 R 0 = 800 W ,变压器的变比 k =10 。若该负载折算到原边的阻值正好与 R 0 达到阻抗匹配,则可知负载 R L 为( )。
A.
80 W
B.
8 W
C.
0.8 W
D.
800 W
【多选题】休克指数的描述正确的是
A.
指数为0.5,提示无休克
B.
指数为1.0~1.5,提示存在休克
C.
脉率与收缩压之比
D.
指数为>1.5,提示休克严重
【单选题】一个负载RL经理想变压器接到信号源上,已知信号源的内阻R0=800W,变压器的变比K=10。若该负载折算到原边的阻值R¢L正好与R0达到阻抗匹配,则可知负载RL为 (   )
A.
80°
B.
0.8
C.
8
D.
68
【单选题】一个 R L =8 W 的负载,经理想变压器接到信号源上,信号源的内阻 R 0 =800 Ω ,变压器原绕组的匝数 N 1 =1000 ,若要通过阻抗匹配使负载得到最大功率,则变压器副绕组的匝数 N 2 应为( )。
A.
100
B.
1000
C.
500
D.
200
【单选题】休克指数的判断正确的是
A.
>0.5表示有休克,>1.0为严重休克
B.
0.5~1.5表示有休克,>1.5为严重休克
C.
1.O~1.5表示有休克,>1.5为严重休克
D.
>1.O~1.5表示有休克,>2.0为严重休克
E.
>1.5表示有休克,>2.0为严重休克
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