单项选择题

Landsat 7 shows how changes have occurred on land by sending back（）

A．images taken with a Polaroid camera
B．the latest images taken by a government satellite
C．a television camera
D．astronauts

<上一题目录下一题>

热门试题

单项选择题

Landsat 7 knows that Alaskan glaciers have shrunk because（）

A．sightseers have noted the changes
B．computer-animated views have shown the shrinkage
C．one of the glaciers was hit by a ship
D．the temperatures are much colder

单项选择题

NASA can tell that vegetation is growing back because of（）

A．a bright, white light that is reflected
B．little tiny trees that are growing
C．vegetable gardens that are planted
D．a light, pinkish view from space