S＝(D1-D2)/H＝K/H。S为锐利度；K为对比度；H是A．高度 B．密度 C． 发布时间：2018-01-07 16:04 │ 来源：www.tikuol.com 题型：单项选择题 问题： S＝(D1-D2)/H＝K/H。S为锐利度；K为对比度；H是A．高度B．密度C．厚度D．模糊值E．灰雾值
题型：单项选择题 完形填空。 I have had thousands of classes since I started school nine years ago. But only one 1 was the mostimportant. It happened last term just after I had got a 2 result in an exam. I was sad and had lost my confidence. I decided to go to a class which can tell me how to be 3 . The speaker walked into the room. But he did not start talking 4 a teacher. Instead, he held up atwenty yuan note! "Who wants this?" he asked. Unsurprisingly, 5 of us in the class put up our hands. The speaker smiled. Then he put up the note on the blackboard and asked the same question. Again, we all put up our hands. The speaker smiled again, but 6 nothing. Suddenly, he threw the note onto the floor!Then he asked the same 7 a third time. I didn't 8 what the speaker was doing. Why was he asking the same question again and again? I didn't know what to do. I wanted the note, 9 I put my hand up again. After a while, he 10 the note and startedto laugh. "You have all just told me how to become successful," 11 said to us with the note in his hand. "The note is worth (值) twenty yuan. It is 12 worth twenty yuan, even though I throw it on the floor. You are like the note. No matter 13 happens to you, you still have your worth." When I heard those words, I was deeply moved. Suddenly, I 14 I was worth a lot. I may have done badly in an exam, but it doesn't 15 I can't do well in the future. If I believe in myself, I will be successful. ( ) 1. A. classroom ( ) 2. A. same ( ) 3. A. comfortable ( ) 4. A. like ( ) 5. A. both ( ) 6. A. said ( ) 7. A. student ( ) 8. A. remember ( ) 9. A. so ( ) 10. A. took out ( ) 11. A. you ( ) 12. A. never ( ) 13. A. when ( ) 14. A. realized ( ) 15. A. know B. subject B. good B. successful B. for B. neither B. bought B. teacher B. understand B. though B. threw away B. he B. sometimes B. who B. forgot B. mean C. class C. lucky C. famous C. about C. all C. saw C. question C. notice C. if C. picked up C. she C. hardly C. what C. dreamed C. think D. school D. bad D. rich D. by D. none D. wanted D. way D. find D. or D. put down D. they D. always D. how D. decided D. complain 查看答案
题型：单项选择题 If you want to buy some pears, you can go to the .[ ]A. bookstore B. fruit shop C. pet shop D. library 查看答案
题型：单项选择题 女性，16岁，一周来尿少色红，眼睑及下肢浮肿，血压20／14kPa，尿蛋白++，尿沉渣红细胞10～15／高倍视野，白细胞5～10／高倍视野，可见红细胞及颗粒管型，血红蛋白12克／dl，A／G40／22g／L，胆固醇5mmol／L，BUN6mmolL，血清C3降低。应采取的治疗是（）A.卧床休息 B.治疗感染灶 C.利尿消肿 D.低盐饮食 E.以上都是 查看答案