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如图(1)所示,在边长为12的正方形AA′A 1' A1中,点B、C在线段AA′上,点B1、C1在线段A1A1′上,且有CC1∥BB1∥AA1,AB=3,BC=4.连结对角线AA1′,分别交BB1和CC1于点P和点Q.现将该正方形沿BB1和CC1折叠,使得A′A1′与AA1重合,构成如图(2)所示的三棱柱ABC﹣A1B1C1,连结AQ.

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Things to Remember When You're Having a Bad Day

    Even the hardest days contain lessons that will help you be a better person. Feeling down? Consider these things to remember when you're having a bad day.

    No one promised life would be perfect.

    ____Don't base your happiness on meeting every expectation you set for yourself. It is good to be ambitious, but you'll never be perfect. If you expect otherwise, your life will be filled with disappointments.

    ____

    Trees that are slow to grow bear the best fruit. Don't kid yourself into thinking success will come quickly. It isn't easy to be patient, but anything worth doing requires time____

    Without hard times, you wouldn't appreciate the good ones.

    Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to give up, that is strength____. It is hard to find much to smile about when you fail, but how else would you improve yourself? If you look at failures as a part of your growing process, you'll stay positive and follow your goals for as long as it takes.

    It's OK to cry sometimes.

    Do not apologize for crying. Without this feeling, we are only robots. Don't be afraid of crying____Instead, it is an acceptable way to let go of your depressed feelings. If you let those feelings build up without release, you'll have a much harder time dealing with them later.

A.Don't get sad if you lose.

B.It isn't a sign of weakness.

C.Success doesn't happen overnight.

D.It's not OK to worry now and then.

E.Don't compare your life with others'.

F.Remember: Rome was not built in a day.

G.If you look for perfection, you'll never be content.