How can you find out what is going on inside a person" s body without opening the patient up? Regular X-rays can show a lot. CAT scans can show even more. They can give three-dimensional(三维) view of body organs(器官). What is a CAT scan? CAT stands for Computerized Axial Tomography(层面X线照相术). It is a special X-ray machine that gets a 360 - degree picture of a small area of a patient"s body. Doctors use X-rays to study and examine diseases and injuries within the body. X-rays can find foreign objects inside the body or to take pictures of some organs inside if special things as dyes or special liquids are added to the organs to be X-rayed. A CAT scanner, however, uses a beam(光束) of X-rays to give a cross-sectional view of a particular part of the body. A fine beam of X-rays is scanned across the body and circled around the patient from many different angles(角度). A computer analyzes(分析) the information from each angle and produces a clear cross-sectional picture on the screen. This picture is then photographed for later use. Several cross-sections, taken one after another, can give a clear "photo" of the entire body or of any body organs. The newest CAT scanners can even give a clear picture of active, moving organs just as a fast-action camera can "stop the action" giving clear pictures of what appear only mistily(模糊) to the eye. And because of the 360 - degree pictures, CAT scans show 3-dimensional views of organs in a manner that was once only seen during surgery or autopsy (examining a dead body). 一、 According to the first two paragraphs, doctors can see the inside of a patient"s body by ______. A、giving the patient an operation B、checking body organs C、getting a 360-degree picture of a small area of a patient"s body D、examining the CAT 二、 From the last paragraph, we can infer that ______. A、the newest pictures become more misty B、many pictures can be taken at the same time C、the information about the scanned patient is not highly valued D、some pictures of the scanned parts of the body are developed for further examinations in the future 三、 The best title of this passage might be ______. A、Modern X-ray B、Three-dimensional View C、Fast - moving Camera D、CAT Scan
How can you find out what is going on inside a person" s body without opening the patient up? Regular X-rays can show a lot. CAT scans can show even more. They can give three-dimensional(三维) view of body organs(器官).
What is a CAT scan? CAT stands for Computerized Axial Tomography(层面X线照相术). It is a special X-ray machine that gets a 360 - degree picture of a small area of a patient"s body.
Doctors use X-rays to study and examine diseases and injuries within the body. X-rays can find foreign objects inside the body or to take pictures of some organs inside if special things as dyes or special liquids are added to the organs to be X-rayed.
A CAT scanner, however, uses a beam(光束) of X-rays to give a cross-sectional view of a particular part of the body. A fine beam of X-rays is scanned across the body and circled around the patient from many different angles(角度). A computer analyzes(分析) the information from each angle and produces a clear cross-sectional picture on the screen. This picture is then photographed for later use. Several cross-sections, taken one after another, can give a clear "photo" of the entire body or of any body organs. The newest CAT scanners can even give a clear picture of active, moving organs just as a fast-action camera can "stop the action" giving clear pictures of what appear only mistily(模糊) to the eye. And because of the 360 - degree pictures, CAT scans show 3-dimensional views of organs in a manner that was once only seen during surgery or autopsy (examining a dead body).
一、According to the first two paragraphs, doctors can see the inside of a patient"s body by ______.
- A、
giving the patient an operation
- B、
checking body organs
- C、
getting a 360-degree picture of a small area of a patient"s body
- D、
examining the CAT
From the last paragraph, we can infer that ______.
- A、
the newest pictures become more misty
- B、
many pictures can be taken at the same time
- C、
the information about the scanned patient is not highly valued
- D、
some pictures of the scanned parts of the body are developed for further examinations in the future
The best title of this passage might be ______.
- A、
Modern X-ray
- B、
Three-dimensional View
- C、
Fast - moving Camera
- D、
CAT Scan
题目解答
答案
(C)
(D)
(D)
解析
考查要点：
- 细节理解：根据文章前两段，明确医生观察患者体内状况的具体方法。
- 逻辑推断：结合最后一段内容，推断CAT扫描技术的实际应用价值。
- 主旨概括：通过全文内容，提炼文章的核心主题。
解题核心：
- 第一题：抓住关键短语“360-degree picture”和“small area”，对应CAT扫描的核心功能。
- 第二题：关注“for later use”和“developed for further examinations”等隐含信息。
- 第三题：文章围绕CAT扫描的技术特点展开，标题需体现核心内容。
一、第一题
关键信息：
- 第一段提到“Regular X-rays can show a lot. CAT scans can show even more”，说明CAT扫描比普通X光更先进。
- 第二段明确指出“CAT scanner... gets a 360-degree picture of a small area of a patient's body”。
选项分析：
- C选项直接对应文中描述，正确。
- 其他选项（如A“做手术”、D“检查CAT机器”）与题干无关。
二、第二题
关键信息：
- 最后一段提到“the picture is then photographed for later use”，说明照片被保存以供后续检查。
- “Several cross-sections... can give a clear 'photo' of the entire body”暗示多张照片组合用于分析。
选项分析：
- D选项“为未来检查开发照片”符合文中“photographed for later use”。
- A选项“图片更模糊”与“clear pictures”矛盾；B选项“同时拍多张”与“one after another”不符；C选项“信息不被重视”与“analyzes the information”矛盾。
三、第三题
关键信息：
- 全文围绕CAT扫描的技术原理、优势及应用展开，标题需体现核心内容。
选项分析：
- D选项“CAT Scan”最全面概括文章主题。
- A、B、C选项仅涉及部分内容（如X光、三维视图、快拍技术），不够精准。