问题
填空题
已知（a2+a+2）x＞（a2+a+2）1-x，则x的取值范围是______．
答案
∵a2+a+2=(a+
)2+1 2
＞1，7 4
且（a2+a+2）x＞（a2+a+2）1-x，
∴x＞1-x，∴x＞
．1 2
故答案为：x＞1 2
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已知（a2+a+2）x＞（a2+a+2）1-x，则x的取值范围是______．
∵a2+a+2=(a+
)2+1 2
＞1，7 4
且（a2+a+2）x＞（a2+a+2）1-x，
∴x＞1-x，∴x＞
．1 2
故答案为：x＞1 2
| 完形填空 | ||||
| "Two books per visit per week,"said the unsmiling librarian as she handed a library card.Neither the limits nor her attitude _1_ me, a 9yearold Jewish girl growing up in Berlin in the 1950s.I needed those visits.The books were filled with stories in which, however_2_ things seemed, everything_3_ well in the end, _4_ justice, bravery, and wisdom-a striking contrast (对比) to my everyday experiences. Thirty years later, I, a recent immigrant to the US with a daughter aged 13, stood in front of another librarian.This librarian was__5__. "What did she say?" I asked my daughter, who already knew a little English and often _6_as my interpreter. "She said 'Can I help you?'" "Ask if they have any books in_7_," I requested. "No, they don't." translated my daughter. While hunting for a job, I was told that the library needed people to_8_ books.The interview was short－the job didn't require much English, just a_9_ of the alphabet.I started the next day.Every day, I handled hundreds of books whose meaning was 10 from me, mentally dividing them by size and color. One day, while shelving, I found English for Beginners and began studying it on my own. 11 English letters started forming words I could 12 , words combined into phrases, and-oh, 13 !-I was reading.It was a slow process, supported by dictionaries and 14 by tears, but it was progress.Afterwards I got promoted to the front desk- 15 books in and out and answering simple questions. Every day I receive dozens of people.Sometimes I spot new immigrants.They come from all over the world, so they look different, but the hesitant expression on their faces and their 16 manners are similar. My heart goes out to them, 17 they are people like me.I fully understand the 18 roads on which they have stepped."They've come to the right place," I think to 19 .Then I smile and say-just the 20 a librarian said to me a long time ago-"Can I help you?" | ||||
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