| How can you find 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 a three- dimensional view of
body organs. What is a CAT scan CAT stands for Computerized Axial Tomography. It is a special X-ray machine that obtains a 360-degree picture of a small area of a patient’s body. Doctors use X-rays to study and diagnose diseases and injuries within the body. X-rays can locate foreign objects inside the body or take pictures of some internal organs—if special substances such as dyes of special liquids are added to the organs to be X-rayed. A CAT scanner, however, uses a beam of X-rays to give a cross-sectional view of a specific part of the body. A free beam of X-rays is scanned across the body and rotated around the patient from many different an A. (A) It utilizes computer techniques. B. (B) It gives clear images of active, moving body parts. C. (C) It can stop the action of an organ for a fraction of a second. D. (D) It is safer than regular X-ray procedures. [填空题]
How long can we obtain some of the techniques and inventions presented in the article [填空题]How can that helicopter work
[填空题]How can we support mechanism
[单项选择]How can she get the data
A. Ask the man to forward the email． B. Use a flash disk to copy the email. C. Ask the manager to send her the email [单项选择]How can listeners get more information
A. By logging on to a website B. By switching to another channel C. By tuning in to a nightly show D. By listening to the next report [填空题]How can you improve your manners
[单项选择]How can Mark speak Russian now
A. He can speak it very well even without accent. B. His accent is so strong that nobody understands him. C. It is his best foreign language but he doesn’t speak it as well as before. 我来回答: 提交
|
