正常控制可以是使变量保持在常数的定制调节，也可以使变量的跟踪变化的随动调节。
题型：判断题
问题：
正常控制可以是使变量保持在常数的定制调节，也可以使变量的跟踪变化的随动调节。
题型：判断题
What is “Walk to school”?
Now we are working on a program of “walk to school”. We would like as many parents and children as possible to take part, even if in a small way. Children who walk to and from school along with their parents can learn essential(基本的) road safety and life skills.
You can take part by…
● Walking to and from school with your child every day.
● Walking for one or two days during the week.
● Encouraging others to walk, if you have already done.
Walking is great!
● Walking is great exercise! A walk is good for your body and can keep you fit.
● You won’t have to waste time looking for a parking site(停车点).
● It’s free. You’ll save money by not using the car.
● It’s pollution free.
● It’s a good chance to your children and to meet other parents, too.
Enjoying walking to school!
Here are some suggestions to help you and your child enjoy walking to school.
● Plan a safe route together.
● Teach children what a kerb(马路牙子) is and what it means.
● Encourage your child to help you choose the safest places to cross the road.
● Look at and discuss the things you see on your way—especially road signs and what they mean.
Walk to school! Thousands of parents and children have already taken part, could you?
Please go to WWW.walkschool.org.uk for more information.
小题1:“Walk to school” may be _________.
A．a relaxing advertisement
B．an interesting sign
C．a meaningful program
D．a colorful picture小题2:Who are encouraged to take part in Walking to school?
A．Parents and children
B．Drivers and workers.
C．Teachers and students.
D．Mothers and fathers.小题3:Walking to school can help you __________.
A．how to walk to school quickly
B．save time to get to school
C．draw some pictures of the kerb and road signs
D．learn essential road safely and life skills小题4:Which is NOT the benefit(好处) of walking to school?
A．It can keep you fit.
B．It can save money.
C．It won’t pollute the air.
D．It can’t help you make new friends.小题5:According to the writer, you can learn more about “walk to school” by?
A．reading a newspaper
B．going to the Internet.
C．making a phone call
D．having a traffic lessons.
