如何选用行程开关?

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问题:

如何选用行程开关?

考点:电子与通信技术电气与可编程控制技术电气与可编程控制技术题库
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股份有限公司股东大会会议应由()召集。

A.总经理

B.董事秘书

C.董事长

D.董事会

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2岁以内小儿乳牙数目约等于月龄减4~6。

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抗酸药中既能与强酸反应,又能与强碱反应,又能适应胃溃疡病人的物质是                                   

A.CaCO3

B.Al(OH)3

C.Mg(OH)2

D.NaHCO3

题型:问答题 简答题

The key to reaching or staying at a healthy weight is regular exercise and good eating habits. Teens should get 60 minutes or more of physical activity a day. Note the word “activity”. As long as you’re getting your body moving, it doesn’t have to mean doing complicated exercises or going to the gym (体育馆) every day. All that matters is that each week you get the right balance of activity, including aerobic (有氧健身法的) strength building, and flexibility (柔韧性) exercise. Make exercise a habit by scheduling some every day.

On days when you have soccer practice or an aerobics class, you may have no trouble exercising for an hour or more. But most of us are busy, and 60 minutes a day of activity seems like a lot of time. The good news is that it’s OK to divide it into shorter “exercise breaks” throughout the day. Just as you might have a healthy snack to stop yourself getting hungry, exercise snacks can keep energy level high. So get up 15 minutes earlier and do some yoga or other stretching (伸展) activity. Fast walk or jog (慢跑) for 15 minutes at lunch. Do the same thing after school ­­­­­or walk or bike home. Add to that taking the stairs, gym class, and walking between classes during the day, and you’ve probably reached your 60 minutes.

Here are 5 simple ways to make an exercise lifestyle change:

1. Start today. Go outside for a walk.

2. Take the stairs instead of the elevator.

3. Instead of driving, walk or bike to places like school or a friend’s house.

4. Clean your room or wash the car.

5. Limit your time watching TV, using the computer, or playing video games--and when you do play, try some games that get you moving.

小题1: The underlined phrase “exercise snacks” in the second paragraph probably means ________.

A.food eaten before exercise

B.food eaten during exercise

C.shorter “exercise breaks”

D.a new kind of exercise小题2:Why should we have exercise snacks every day?

A.Because they can stop us getting hungry

B.Because they can keep energy level high

C.Because they can include many kinds of sports

D.Because they are more likely to relate to our daily life小题3:Which of the following is NOT mentioned in the passage?

A.To go hiking on your holidays

B.To spend less time on computer games

C.To go to school on foot or by bike

D.To do some housework at home小题4:What will be most probably discussed in the following paragraph?

A.Losing weight

B.Good eating habits

C.Exercising your brain

D.Outdoors exercise小题5: What would be the best title for this passage?

A.Regular exercise

B.School exercise

C.Indoors exercise

D.Difficult exercises

题型:问答题 简答题

有关建筑结构得功能要求,选出下列不正确得选项()。

A.能承受使用期间可能出现得各种作用

B.保持良好得使用性能

C.具有足够得耐久性能

D.当发生爆炸、撞击、人为错误等偶然事件时,结构能保持必需得整体稳固性

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