问题
单项选择题
关于CT层厚的叙述,错误的是()
A.准直宽度是指CT机球管侧和受检者侧所采用准直器的宽度
B.在多层螺旋扫描方式时,决定层厚的是所采用探测器排的宽度
C.有效层厚指扫描时实际所得的层厚
D.层厚越小,误差越大
E.层厚的误差与扫描所采用的方式和设备的类型有关
答案
参考答案:E
解析:层厚的误差与扫描所采用的方式和设备的类型无关。
关于CT层厚的叙述,错误的是()
A.准直宽度是指CT机球管侧和受检者侧所采用准直器的宽度
B.在多层螺旋扫描方式时,决定层厚的是所采用探测器排的宽度
C.有效层厚指扫描时实际所得的层厚
D.层厚越小,误差越大
E.层厚的误差与扫描所采用的方式和设备的类型有关
参考答案:E
解析:层厚的误差与扫描所采用的方式和设备的类型无关。
用方框中所给词的适当形式填空。 | |
Carol's Cafeteria 1 the most delicious food in town but there is one 2 . It's not in the most funniest 3 0f town. It 4 about fifteen minutes to walk there 5 school. My friends and I usually go to Lenny's Lunch Bar. It's closer 6 the food isn't really bad.The people at Lenny's al'so 7 than those at Carol's. In 8 Lenny's is the friendliest place in town. They have the biggest hamburgers and the best salad. 9 their pizza ls pretty bad. You 10 never have pizza at Lenny's. 1. _________2. _________3. _________4. _________5. _________ 6.________7. _________8. _________9. _________10. _________ |