问题
解答题
计算：（
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答案
原式=
•x2-y2 xy x x+y
=
•(x+y)(x-y) xy x x+y
=
．x-y y
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计算：（
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原式=
•x2-y2 xy x x+y
=
•(x+y)(x-y) xy x x+y
=
．x-y y
| 完形填空 | ||||
| The night started our ordinarily enough.Jack and Tara, our__1__, were in their small beds surrounded by toy animals.My husband, Pat, and I went to sleep__2__. __3__after midnight, Jack quietly touched me."Mommy, I want to stay with you.I promise I won't take much room." I shifted__4__to make room.My son soon fell asleep. An hour later, Tara cried and I carefully went downstairs."Mommy, my__5__is all stuffed up (堵住). I can't really breathe very well.Will you please__6__with me a little while?" Tara doesn't often get up at night, __7__I decided to be there for her.She soon fell asleep.I returned to my own bed.I was determined to sleep.But to my__8__, I found Jack sleeping on my side of the bed.He looked so__9__that I couldn't remove him.Quietly and carefully, I lay down between__10__and Jack. I did manage to get some sleep__11__I heard Tara's voice again.I returned to__12__Tara."Mom, please lie down with me a little bit.I had a bad dream, and I'm so__13__.""Of course, honey.It was only a dream.Mommy's here and__14__is okay." We fell asleep__15__each other's arms. Even in my sleepy state, I thought of__16__these nights of merrygoround (一连串的繁忙活动) will be over.In their place, my twins will be grown.__17__before I'm ready, our children's rooms will be much too__18__and empty.So it is especially on days when I'm worn out after a night on this mom's merrygoround that I remind__19__that these very days and nights are, in fact, "the good old days", ever so__20__. | ||||
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