问题
单项选择题
上述关系式中，光学对比度与X线对比度的关系式是（）。
A．D=lgIo/1
B．K=D1-D2
C．K=lgKx
D．S=K/H
E．R=1/2d
答案
参考答案：C
解析：
K(光学对比度)=lgKx(X线对比度)
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上述关系式中，光学对比度与X线对比度的关系式是（）。
A．D=lgIo/1
B．K=D1-D2
C．K=lgKx
D．S=K/H
E．R=1/2d
参考答案：C
解析：
K(光学对比度)=lgKx(X线对比度)
| 用括号内所给单词的适当形式完成句子。 | |
2. The young teacher was loved because he made the children glad in _____ of ways. 3. In Disney _____ Robinhood there are a lot of animal characters. 4. Do you feel any _____ for this book? 5. Young people usually live in a world of _____. They are not realistic. 6. The _____ of our lesson is the development of the science. 7. There are _____ games in our sports meeting. 8. It's the duty of the police to _____ the public order. 9. They might _____ together to watch the sunrise. 10. You should _____ your new environment as quickly as possible. |