问题
单项选择题 A1/A2型题
体层机X线管运行的最大幅度（角度）称为（）
A.荡角
B.工作角
C.照射角
D.体层面
E.体层面厚度
答案
参考答案：A
解析：体层摄影中，X线管从开始运行到终止，摆杆与支点构成的夹角称为荡角，即X线管运行的幅度。
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体层机X线管运行的最大幅度（角度）称为（）
A.荡角
B.工作角
C.照射角
D.体层面
E.体层面厚度
参考答案：A
解析：体层摄影中，X线管从开始运行到终止，摆杆与支点构成的夹角称为荡角，即X线管运行的幅度。
| 用方框中所给单词的适当形式填空，有两词是多余的。 | |
we're sure they'll help you to learn English more l______ and with more fun! ◇Become interested Find something 2______ about your English study. Why not 3______ your favorite English films? You can also read the lyrics (歌词) of pop songs, or check out celebrity sites (名人网站.) to learn more about your favorite basketball or football 4______. ◇Don't study for too long Studying 15 minutes each day is much 5______ than studying 2 hours once a week. Studying 6______ much mole fun. if you don't feel tired. ◇Learn through reading Read English texts as 7______ as you can. They could be news, short stories or 8______. Choose an interesting text that isn't too difficult for you. ◇Learn through movies and songs Choose your favorite movie. Have paper and pen ready 9______ you may want to write down some useful words or phrases. Listening to your favorite English songs is 10______ cool way. Read first, and then find out what the song is about. Pick some words or phrases that you'd like to learn. A dictionary may also be useful. |