问题
单项选择题
关于CT准直器的叙述，错误的是
A．位于X线管套窗口前方
B．里狭缝状态
C．决定X线扇束厚度
D．决定单层扫描层厚
E．决定扫描层距
答案
参考答案：E
解析：CT准直器不能决定扫描层距。
搜题请搜索小程序“爱下问搜题”
关于CT准直器的叙述，错误的是
A．位于X线管套窗口前方
B．里狭缝状态
C．决定X线扇束厚度
D．决定单层扫描层厚
E．决定扫描层距
参考答案：E
解析：CT准直器不能决定扫描层距。
In the old days, the Olympic Games were religious（宗教的）activities. Greece held the first Olympic Games in the eighth century B.C. The Games lasted just for one day and there were only races. Only men could be in the races. Women had no right（权利）to take part in the Olympic Games until 1912. The Olympic Games were stopped in the fourth century. Then they started again in Athens in 1896. This was the beginning（开始）of the modern Olympics. Since then, the Olympics Games have been held every four years. The Olympic rings are a symbol of the Olympic Games. There are five rings, and they stand for the five parts of the world. The colors of the rings are blue, yellow, black, green and red. You can find at least one of these colors in the flag of each country in the world. The IOC（国际奥委会）makes rules for the games, so all the athletes have the same chance to win. Winning in the Olympics is a great honor. An athlete who wins at the Olympics is the best in the world. “Faster, higher, stronger”is the motto of the Olympics. 任务型阅读：根据短文内容填写下列空格。
|