MCQOPTIONS
Saved Bookmarks
| 1. |
Inside an aeroplane, flying at a high altitude , _________________ |
| A. | normal atmospheric pressure is maintained by the use of air pumps |
| B. | normal humidity and partial vacuum are maintained |
| C. | the pressure inside is less than the pressure outside |
| D. | the pressure is the same as that outside |
| Answer» B. normal humidity and partial vacuum are maintained | |