题干

如图所示,在探究电磁铁的磁性强弱与什么因素有关实验中,下列说法中正确的是

A:把滑动片向左滑动时,磁性减弱

B:把滑动片向左滑动时,磁性增强

C:若增加线圈匝数,磁性将减弱

D:若改变电流的方向,磁性将增强

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B

同类题3

任务型阅读

Making Peace with Your Parents

    As a teen, you're going through big changes physically and mentally. Your interests are increasing.____Here is the challenge: Kids need to explore the world in new ways, and parents need to protect them from the dangers that are all out in that world. These conflicts can easily set off fireworks in otherwise calm houses. Sometimes conflicts can't be avoided. But by paying attention to the building blocks of successful relationships, you can work towards making home a happy and healthy place for you and your parents.

    For example, try to find a time to talk when your parents are not angry, tired, distracted or hungry. A good time to talk is when you're all relaxed. Timing is everything if the conversation begins to turn into an argument, you'd better calmly and coolly ask to stop the conversation for now.____ Listen to what your parents are saying, and repeat it back to them. This shows them that you're listening. ____ Respect is the building block of good communication. People who respect each other and care about each others' feelings can disagree without getting things ugly.____ How do you build trust? Trust comes by actually doing what you say you're going to do. Some teens find that doing fun activities with their parents can improve their relationships. Sometimes we forget that parents are more than rule-maker—they're interesting people who like to watch movies and go shopping—just like their teenagers!

    What do you do if you are trying your best, but your relationship with your parents continues to be rocky?____You can find supportive adults, such as a teacher or a coach, who can lend an ear. Remember you can only change your own behavior. Your parents are the only ones who can change theirs.

A. You may consider seeking outside help.

B. And then you'll be able to accept what your parents say.

C. You can pick it up again when everyone's more relaxed.

D. Faced with the challenge, children don't know what to do.

E. And your desire to take control of your own life is growing.

F. It also gives them a chance to clear things up if you're not on the same page.

G. You are more likely to get along with your parents and have more independence if your parents believe in you.

同类题5

任务型阅读

    It seems that there is never enough time in the day. But,since we all get the same 24 hours,why is it that some people achieve much more than others?____.

Keep a to-do list.

    You should have a reminder system to tell you when you need to do what.____Carry a pen andpaper wherever you go and write down the things you need to do, including appointments and deadlines.

Set goals.

    Set yourself specific goals,and make sure that they are realistic. To do this, you first need to examine your present situation and assess(判断)which goals are important to you. Have a secondary route to your goals in case you have to change your plans.

Break down (分解)tasks.

    Break goals down into different parts so that you can accomplish them one step at a time____Try to complete one task before you go on to the next.

Organize your time.

    ____A good way to do this is to record everything you do for a week in detail and then examine your record to see how you use or waste your time.

____

    Keep your work space tidy so that you can work efficiently - it's hard to work if things you need to find are buried under a pile of paper! Work to schedule (为...安排时间)so that you can meet deadlines in good time - don't leave everything until the last minute.

A Develop a regular work order.

B. Make a detailed plan.

C. The best time to do something is usually NOW.

D. The answer lies in good time management.

E. Don't try to remember everything in your head.

F.Write these steps down, and try to be as detailed as you can when you do this.

G. Identify areas of your life where you are wasting time and try to reduce them.