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为什么——人体篇
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文档语言：
中文
章节数量：
61
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文档概述
This is a picture book about the human body it answers 62 questions about the human body, such as why men have beards; why people have dreams; why some people are fat and some thin ;how the eyes see t...
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Questions About the Human Body
When Do People Stop Growing?
Why Do Older People Have Gray or White Hair?
Why Do Old People Have Wrinkles on Their Faces?
Why Do People Have Different Colours of Hair?
How Does Hair Grow Back Again After Falling Out?
Why Do People Have Dreams When They Sleep?
How Many Bones Does a Person's Body Have?
Why Are Some People Fat and Some Thin?
Why Do Men and Women Have Different Sounding Voices?
Why Are There Mutes?
Why Do Men Have Beards?
How Can the Eye See Things?
Does a Person with Big Eyes See Farther Than a Person with Small Eyes?
Why Are Some Children Shortsighted?
What's the Function of Tears?
Where Does the Gum in the Eyes Come from?
Why Don't the Eyes Feel Cold?
What Can You Do If a Speck of Dirt Gets in Your Eye?
Why Do People Blink Their Eyes?
Why Do Your Eyes Get Red When You Cry for a Long Time?
Why Do the Eyelids Twitch?
Why Can't You See Clearly When You First Go into a Dark Place?
How Does the Nose Smell?
Where Does Mucus Come From?
Why Is My Nose Stuffed up When I Get .a Cold?
Why Do People's Noses Run When They Cry?
How Do We Breathe?
Why Do People Yawn?
Why Do People Sneeze?
How Do the Ears Hear?
Where Does Earwax Come from?
How Can the Tongue Taste Different Flavours?
How Do the Fingernails Grow?
Why Don't People Feel Pain When They Cut Their Nails?
Why Is It Bad to Bite Your Nails?
What Are Fingerprints, and Why Do We Have Them?
Where Does Sweat Come from?
Why Do People Feel Cold When They Get Out of Water?
Why Does My Mouth Water When I See Sour Food?
Why Is It Bad to Eat Fast?
Where Does the Food Go After You Eat It?
Why Do People Have Bowel Movements Every Day?
Why Do People Pass Gas?
What Does the Uvula Do?
Where Is the Stomach?
Why Do People Have Navels?
Why Shouldn't Children Dig Their Navels?
Why Do People Need Salt?
Why Do People Drink Water?
Why Shouldn't People Have Too Many Sweet Drinks?
How Do People Get Roundworms?
Why Do People Need Sunshine?
Why Should Children Sleep Separately from Their Parents?
Why Should Children Use Knapsack Schoolbags?
What Should You Do When Water Enters Your Ear?
Why Do People Get Sick?
Why Do People Have Headaches?
Why Do Children Catch Cold Easily?
Why Do People Lose Their Voices When They Catch Cold?
Why Are Some People Afraid of High Places?
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