laughingHappyHappySurprisedSurprisedOur eyebrows also help us ...Our eyebrows also help us ...Keep sweat out of our eyes.Protect our eyes from dust.Keep sweat out of our eyes.Keep sweat  ……

?A LITTLE girl is watching her mother do thedishes(洗碗) in the kitchen.She sees some white hairs on her..., every time you do something wrong and make me unhappy, one of my hairs turns white."The little girl ……

). Each hair grows about 0.36 millimeters every day. You can do the math. TEENSBig eyes keep me safeBig eyes keep me safe鸵鸟的眼球比大脑大。Ostriches have very big eyes. They are even bigger than its brain ……

from dryness by bringing tears to the eyeball.Another benefit of blinking is to keep the eyes safe...Q: Why do we blink our eyes?A: When blinking, our eyes supply themselves with oil and tears ……

waste can be very useful. C. It’s better to keep our hair short.  C. It’s better to keep our hair short.  D. People did many studies about hair.  D. People did many ……

, they tell the computer what a real lion looks like. How big are his eyes? How many hairs does he have...别“上当”喽，这些都是电影特效！The new Lion King film is coming this summer. Look at this cute little lion Simba ……

日常生活中应当怎样爱护耳朵？We do eye exercises. We wear sunglasses. We do a lot of things to protect our eyes. But we usually forget another important part of our body－ the ears.Ears help us hear the world ……

“小伞”让我飞得远“小伞”让我飞得远Blow a dandelion (蒲公英). Many little fluffy (蓬松的) seeds fly away. They fly with the wind. Each seed has about 100 “hairs”. With the “hairs”, the seed flies like a parachute (降落 ……

we do to keep our bodies safe? What can we do to keep our bodies safe? Be careful about... eyes? Here’re some interesting facts about Mars.Why are Martians often little green men with big ……

do to keep our bodies safe? Be careful about bad guys behind the screen.Protect yourself学会保护自己How do you deal with strangers properly?What can we do to keep our bodies safe? Be careful about ……

   为什么我们会秃头？为什么我们会秃头？Our hair grows from hair follicles (毛囊). We have about 100,000 hairs on our head. Every day, we lose about 100 hairs. If new hairs don’t start growing, then we ……

植物的根为什么都是向下生长的？词数 354 建议阅读时间 5分钟 教案见网站DO you keep plants at home? Have you ever wondered why... scientists have recently solved this mystery.It turns out that roots have special hairs that tie them ……

have long hairs.Tusks (象牙) are very long. They keep growing in the elephant’s whole life. Their legs... the elephant feels hot, it will fan its ears, and its blood will cool off.Their eyes are larger than yours ……

可以发光的自行车锁Bike locks keep our bikes safe. This one can also keep us safe. It is called City Firefly (城市萤火虫). It glows (发光) at night. When we wear it, cars can see us. ……

of one important organ (器官) –   the ear. You may wonder: how do our ears work? The ear... ear and then to your brain (大脑).You may wonder: how do our ears work? The ear has three different ……