在管道断面突然扩大处,测压管水头线沿程();在管道断面突然缩小处,测压管水头线沿程()。
参考答案:上升;下降
在管道断面突然扩大处,测压管水头线沿程();在管道断面突然缩小处,测压管水头线沿程()。
参考答案:上升;下降
完形填空。 |
About a hundred people lived in a very small mountain village. It was very 1 from the other villages |
( )1. A. close ( )2. A. All ( )3. A. visited ( )4. A. to write ( )5. A. after ( )6. A. food ( )7. A. town ( )8. A. gone ( )9. A. sleep ( )10. A. window | B. far B. Some B. lived B. to speak B. later B. music B. mountain B. came B. help B. radio | C. near C. None C. stayed C. to say C. soon C. himself C. village C. been C. walk C. light | D. high D. Hundreds D. got to D. to tell D. ago D. traffic D. London D. got D. see D. TV set |