关于各代CT机结构性能特点的叙述，正确的是（） A.第一代CT机采

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关于各代CT机结构性能特点的叙述，正确的是（）

A.第一代CT机采用旋转-平移扫描方式

B.第二代CT机采用旋转-平移扫描方式

C.第三代CT机采用电子束扫描方式

D.第四代CT机扫描方式只有球管的旋转

E.螺旋CT机扫描机架是连续单向的旋转

答案

参考答案：A, B, D, E

解析：第三代CT机采用旋转.旋转扫描方式。

阅读理解

阅读简答。

Last week's talent show was a great success. There were fifteen acts. Eliza Clark won the prize for the

best performer. She played a beautiful piano piece. Hu Yue was the quietest performer. He danced

without music. The prize for the funniest act went to Steve Tian and his dog, Fido. They sang a cute song

together.

根据短文内容，回答下列问题。

1. Was last week's talent show a great success?

__________________________________

2. How many acts were there in last week's talent show?

__________________________________

3. What did Eliza Clark do in the talent show?

__________________________________

4. How did Hu Yue dance?

__________________________________

5. Who won the prize for the funniest act?

__________________________________

判断题

针叶树材木素中主要是紫丁香基苯丙烷。