问题
单项选择题
下列关于MTF的组合，错误的是
A．MTF——影像清晰度的评价
B．屏/片体系MTF——使用矩形波测试卡c．MTF上升——空间频率高D．焦点MTF测定——傅氏变换法E．MTF上升——屏一片感度低
答案
参考答案：E
解析：MTF上升，成像效果好。
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下列关于MTF的组合，错误的是
A．MTF——影像清晰度的评价
B．屏/片体系MTF——使用矩形波测试卡c．MTF上升——空间频率高D．焦点MTF测定——傅氏变换法E．MTF上升——屏一片感度低
参考答案：E
解析：MTF上升，成像效果好。
| 完形填空。 | ||||
| Lei Feng is always ready 1__________. Once 2__________ the train station, a woman loses 3___________ ticket. She has 4___________ money for 5___________. She looks very 6___________. When Lei Feng learns about it, he buys a ticket 7___________ her. The woman thanks 8___________ and asks his name and address. Lei Feng smiles and 9___________, " My name is a PLA and I live 10___________ China"
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