公称直径为50mm的镀锌钢管书写形式为（）。 A.De50 B.DN50 C.50 发布时间：2017-08-27 13:11 │ 来源：www.tikuol.com 题型：单项选择题 问题： 公称直径为50mm的镀锌钢管书写形式为（）。A.De50B.DN50C.50D.d50
题型：单项选择题 完形填空。 Lucy and I are twin sisters. We always have a strong connection - we can almost read each other's minds. A lot of people say it is? 1 for twins to have that connection, but I neve thought about it much. 2 I do now because the special connection saved Lucy last year. When Lucy left for college, I was 3 we would not keep in touch, but thanks to mobile phones, that didn't? 4 . I was really looking forwatd to her coming home? 5 her vacation. But when shegot home, I felt something was wrong. I asked? 6 she was and she replied that? 7 was fine. A month later I decided to visit her. As I was? 8 to her college. I suddenly couldn't breathe (呼吸),I stopped the car and wondered what was wrong with me, but then I? 9 that it was with my sister.I 10 called her to see if she was OK. She said that things were finc. About twenty minutes later, the same thing happened. but much 11 than before and all I could seein my mind were 12 of my sister lying on the floor. I tried to call her again, but this time she didn't answer. I raced to the 13 parked the car, and ran to her room. When I got there, it was just like what I had seen in my mind. I called 911 and they took 14 to thehospital. When Lucy 15 , she smiled weakly and said the special conned was really magic. ( )1. A. dangerous ( )2. A. Luckily ( )3. A. proud ( )4. A. happen ( )5. A. after ( )6. A. how ( )7. A. nothing ( )8. A. walking ( )9. A. realized ( )10. A. happily ( )11. A. better ( )12. A. picrures ( )13. A. phone ( )14. A. me ( )15. A. gave up B. common B. Finally B. glad B. go B. during B. who B. something B. running B. remembered B. carefully B. worse B. stories B. car B. her B. grew up C. impossible C. However C. surprised C. ring C. except C. where C. anything C. driving C. suggested C. loudly C. nearer C. letters C. hospital C. us C. woke up D. fair D. Personally D. afraid D. change D. past D.what D. everything D. flying D. expected D. quickly D. farther D. problems D. college D. them D. stayed up 查看答案