题干

图中两条平行虚线之间存在匀强磁场,虚线间的距离为l,磁场方向垂直纸面向里.abc是位于纸面内的等腰直角三角形线圈,ab边平行于磁场的虚线边界,bc边长也为l.t=0时刻,c点位于磁场区域的边界上(如图).现令线圈以恒定的速度v沿垂直于磁场区域边界的方向穿过磁场区域.取沿a→b→c的感应电流为正,则在线圈穿越磁场区域的过程中,感应电流I随时间t变化的图线可能是(   )

A:

B:

C:

D:

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A

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    Life is kind of like a party. You invite a lot of people, some leave early, some stay all night, some laugh with you, some laugh at you, and some show up really late. But in the end, after the fun, there are a few who stay to help you clean up the mess. And most of the time, they aren't even the ones who made the mess____ They are the ones who matter most. Here are four things real friends do differently:

    They face problems together. A real friend is someone who sees the pain in your eyes while everyone else still believes the smile on your face.____Just look for someone who will face them with you.

    ____Your word means everything. If you say you're going to do something, DO IT! If you say you're going to be somewhere, BE THERE! If you say you feel something, MEAN IT! If you can't, won't, and don't, then DON'T LIE. Real friends keep promises and tell the truth upfront.

    They accept each other. Trying to change a person never works. A real friend is someone who truly knows you and loves you just the same.____ Be yourself and people will love the real you. If you feel like changing something about your friend, ask yourself what change you can make in yourself instead.

    They support each other's growth changes. Our needs change with time. When someone says, “You've changed,” it's not always a bad thing.____Don't apologize for it. Instead, be open and sincere, explain how you feel, and keep doing what you know in your heart is right,

A. They keep their promises.

B. No one is happy all the time.

C. They make time for each other.

D. Don't change so that people will like you.

E. Sometimes it just means you've grown.

F. These people are your real friends in life.

G. Don't look for someone who will solve all your problems.