8.
Do you know what are the world's tallest animals?How do they sleep and drink?
You may think it's difficult for them to sleep,but they have no such problems because giraffes don't often stop for a snooze.As they are so tall---males can grow up to 18feet,giraffes actually have the shortest sleep requirement of mammals,with an average of half an hour a day.When they sleep,they seldom lie down and sleep for minutes at a time,since it's difficult for them to get up again and it's dangerous in the wild.But the giraffe in the zoo sleeps around 4.6hours per day,mostly at night.It usually sleeps lying down.
Drinking water may cause problems for the animals because their long necks are too short to reach the ground.To drink they must spread their legs in an uncomfortable position,which makes them easily hunted by other animals like Africa's big cats.As a result,they get most of their water from the plants that they eat.They only need to drink water every few days.
91.How long do giraffes living in the wild sleep every day?For half an hour
92.How does the giraffe in the zoo usually sleep?It usually sleeps lying down
93.What must giraffes do to drink water?They must spread their legs in an uncomfortable position
94.What's the main idea of the passage?It's about how giraffes sleep and drink water.
95.请将划线句子翻译成汉语.因此,长颈鹿所需的水分大部分都是从它们吃的植物里获得的.