Compared with planes, drones are more helpful when taking bird's-eye-view images because
A、they can fly longer, without taking a break
B、they can fly faster and carry heavier equipment
C、they can fly higher into the air to get more impressive images
D、they can fly slower and lower to take clear images
【正确答案】：D
【题目解析】：Drones, on the other hand, could fly much slower and lower, which made it easier to take clear images.
