单项选择题Amphibious vehicles, those that can move on both land and water, have been in use for a number of years, but while most of them were fairly fast on land, they moved quite slowly when they were functioning as boats. The only truly amphibious vehicle that can move with equal ...
A topic sentence is normally composed of a limited topic and a controlling idea. Which is proper in each group? 1. a. Im going to write about my job as a tourist guide. b. Working as a tourist guide
"Hovercraft" refers to an amphibious version of a more general air cushion class of vehicles, sometimes called ground effect machines. Hovercrafts are machines which slide along the surface of the ground or a body of water while balancing on top of an air cushioned bubble. The air bubble is...