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But genes don't decide everything. For example, eating an unhealthy diet can keep you from growing to your full potential(潜力). Getting plenty of sleep and enough exercise will help you grow to the expected height.
No doubt you're wondering how fast you should grow. It depends. There's no perfect or right answer. Generally speaking, kids grow about 2 inches (6 centimeters) a year between age 3 and the time when they start puberty (when your body starts changing and becoming more grown up).
Your doctor will know how your growth has been going over the years. Two centimeters here and 2 inches there are not nearly as important as the height you're at now, how you've been growing up to this point, and what other changes your body may be going through.
Don't be scared if you seem to have grown a lot in a very short time. Everyone has a growth spurt（高峰）during puberty. The age for starting puberty is about 10 for girls and about 11 for boys. But it can be earlier or later ----between 7 and 13 for girls and 9 and 15 for boys.
You'll usually begin to notice that you're growing faster about a year or so after your body starts to show the first changes of puberty.
【小题1】. The Chinese for the word “puberty” is .
| A．童年时期 | B．婴幼儿时期 | C．习惯养成期 | D．生长发育期 |
| A．you should have enough exercise | B．you can ask doctors for help |
| C．you should save the environment | D．You can record your growth during puberty |
| A．how the genes work in your body | B．when is the time you grow fast |
| C．why you look like your parents | D．how you grow to a certain height |
| A．how good it is to be a doctor | B．how much sleep time we need |
| C．why genes can’t decide everything | D．what healthy diet is |
| A．Your height most probably depends on how high your parents are. |
| B．Girls’ age for starting puberty is usually earlier than that for boys’. |
| C．The time showing the first changes of puberty is never noticed. |
| D．You may be scared sometimes when you grow too fast. |
What is the sky(天空)? Where is it? How high is it? What lies above it? These questions are hard to answer, aren’t they?
Is the sky blue? The sky has no color. We know that there is air around the world. When planes fly, they need air to lift their wings(翼) . Planes cannot fly very high because when they go high, the air gets thinner. If we go up about 1,200 kilometers from the earth, we find there is no air.
Perhaps(也许) we can answer some of our questions now. The sky is space(空间). In this space there is only the sun, the moon and all the stars.
6.What is the sky?
A. It’s the clouds B. It’s space. C It’s air D It’s nothing
7. The sky _____
A. is blue B. is white C. is black D. has no color
8. Planes cannot fly very high because _________.
A. the air becomes thinner B. the flying machine is not good
C. people will be afraid if the planes fly too high D. it is not necessary for planes to fly so high
9 If we go up about 1,200 kilometers from the earth, we find ___________.
A. there is more air B. there is less air C .there is nothing but air D there is no air
10. In space there is _________.
A. nothing B. air everywhere C. everything D. only the sun , the moon and all the stars
Is the sky blue? The sky has no color. We know that there is air around the world. When planes fly, they need air to lift their wings(翼) . Planes cannot fly very high because when they go high, the air gets thinner. If we go up about 1,200 kilometers from the earth, we find there is no air.
Perhaps(也许) we can answer some of our questions now. The sky is space(空间). In this space there is only the sun, the moon and all the stars.
6.What is the sky?
A. It’s the clouds B. It’s space. C It’s air D It’s nothing
7. The sky _____
A. is blue B. is white C. is black D. has no color
8. Planes cannot fly very high because _________.
A. the air becomes thinner B. the flying machine is not good
C. people will be afraid if the planes fly too high D. it is not necessary for planes to fly so high
9 If we go up about
1,200 kilometers from the earth, we find ___________.A. there is more air B. there is less air C .there is nothing but air D there is no air
10. In space there is _________.
A. nothing B. air everywhere C. everything D. only the sun , the moon and all the stars 查看习题详情和答案>>
What is the sky(天空)? Where is it? How high is it? What lies above it? These questions are hard to answer, aren’t they?
Is the sky blue? The sky has no color. We know that there is air around the world. When planes fly, they need air to lift their wings(翼) . Planes cannot fly very high because when they go high, the air gets thinner. If we go up about 1,200 kilometers from the earth, we find there is no air.
Perhaps(也许) we can answer some of our questions now. The sky is space(空间). In this space there is only the sun, the moon and all the stars.
6.What is the sky?
A. It’s the clouds B. It’s space. C It’s air D It’s nothing
7. The sky _____
A. is blue B. is white C. is black D. has no color
8. Planes cannot fly very high because _________.
A. the air becomes thinner B. the flying machine is not good
C. people will be afraid if the planes fly too high D. it is not necessary for planes to fly so high
9 If we go up about 1,200 kilometers from the earth, we find ___________.
A. there is more air B. there is less air C .there is nothing but air D there is no air
10. In space there is _________.
A. nothing B. air everywhere C. everything D. only the sun , the moon and all the stars
查看习题详情和答案>>
What is the sky(天空)? Where is it? How high is it? What lies above it? These questions are hard to answer, aren’t they?
Is the sky blue? The sky has no color. We know that there is air around the world. When planes fly, they need air to lift their wings(翼) . Planes cannot fly very high because when they go high, the air gets thinner. If we go up about 1,200 kilometers from the earth, we find there is no air.
Perhaps(也许) we can answer some of our questions now. The sky is space(空间). In this space there is only the sun, the moon and all the stars.
6.What is the sky?
A. It’s the clouds B. It’s space. C It’s air D It’s nothing
7. The sky _____
A. is blue B. is white C. is black D. has no color
8. Planes cannot fly very high because _________.
A. the air becomes thinner B. the flying machine is not good
C. people will be afraid if the planes fly too high D. it is not necessary for planes to fly so high
9 If we go up about 1,200 kilometers from the earth, we find ___________.
A. there is more air B. there is less air C .there is nothing but air D there is no air
10. In space there is _________.
A. nothing B. air everywhere C. everything D. only the sun , the moon and all the stars
查看习题详情和答案>>