在一次数学测试中，有 的同学不及格，那么这次考试的及格率是____．

对于二次函数f（x）=4x²﹣2（p﹣2）x﹣2p²﹣p+1，若在区间﹣1，1内至少存在一个数c 使得f（c）＞0，则实数p的取值范围是____

补全对话，根据对话内容，从方框中选择适当的句子填入空白处，使对话完整。（有两项多余）

A: You must be really excited about leaving for America tomorrow, Li Ping!

B: Yeah.____

A: Nervous about what?

B:I don't know many of the customs and manners in the USA.____

A: Sure.

B:____

A: Well, it's important to be on time when you're invited for dinner.____Americans expect their guests to be on time.

B: Then how long may I stay there?

A:____Or you seem to have come only for the meal. When your friends seem to be getting tired and running out of things, it's time to leave. The next day, call or write a thank-you note to say how much you enjoyed the evening.

A. It's good to stay at home for you. B. After the meal, don't leave at once. C. Could you give me a hand? D. What rules do they have in America? E. But I'm a bit nervous. F. You're supposed to leave before the meal. G. It's impolite to arrive late.

阅读下文，完成小题。    刘茂字子卫，太原晋阳人也。少孤，独侍母居。家贫，以筋力致养，孝行著于乡里。及长，能习《礼经》，教授常数百人。哀帝时，察孝廉，再迁五原属国候，遭母忧去官；服竟．后为沮阳令。会王莽篡位，茂弃官，避世弘农山中教授。
    建武二年归，为郡门下掾。时，赤眉二十余万众攻郡县，杀长吏及府掾史。茂负太守孙福逾墙藏空穴中，得免。其暮，俱奔盂县。昼则逃隐，夜求粮食。积百余日，贼去，乃得归府。明年，诏书求天下义士。福言茂曰：“臣前为赤眉所攻，吏民坏死，奔走趣山。臣为贼所围，命如丝发，赖茂负臣逾城，出保盂县。茂与弟触冒兵刃，缘山负食，臣及妻子得度死命，节义尤高。宜蒙表擢，以厉义士。”诏书即征茂，拜议郎，迁宗正丞。后拜侍中，卒官。
    延平中，鲜卑数百余骑寇渔阳，太守张显率吏士追出塞，遥望虏营烟火，急趣之。兵马掾严授虑有伏兵苦谏止不听。显蹙令进，授不获已，前战，伏兵发，授身被十创，殁于阵。显拔刃追散兵，不能制，虏射中显，主簿卫福、功曹徐咸遽赴之，显遂堕马，福以身拥蔽，虏并杀之。朝廷愍授等节，诏书褒叹，厚加赏赐，各除子一人为郎中。
    永初二年，剧贼毕豪等入平原界，县令刘雄将吏士乘船追之。至厌次河，与贼合战。雄败，执雄，以矛刺之。时小吏所辅前叩头求哀，愿以身代雄。豪等纵雄而刺辅，贯心洞背即死。东郡太守捕得豪等，具以状上。诏书追伤之，赐钱二十万，除父奉为郎中。

根据短文内容的理解，选择正确答案。

    Papa, as a son of a dirt-poor farmer, left school early and went to work in a factory, for education was for the rich then. So, the world became his school. With great interest, he read everything he could lay his hands on, listened to the town elders and learned about the world beyond his tiny hometown. "There's so much to learn," he'd say. "Though we're born stupid, only the stupid remain that way. "He was determined that none of his children would be denied (拒绝) an education.

    Thus, Papa insisted that we learn at least one new thing each day. Though, as children, we thought this was crazy, it would never have occurred to us to deny Papa a request. And dinner time seemed perfect for sharing what we had learned. We would talk about the news of the day; no matter how insignificant, it was never taken lightly. Papa would listen carefully and was ready with some comment, always to the point.

    Then came the moment—the time to share the day's new learning.

    Papa, at the head of the table, would push back his chair and pour a glass of red wine, ready to listen.

    "Felice," he'd say, "tell me what you learned today."

    "I learned that the population of Nepal is ...."

    Silence.

    Papa was thinking about what was said, as if the salvation of the world would depend upon it. "The population of Nepal. Hmm. Well……" he'd say. "Get the map; let's see where Nepal is." And the whole family went on a search for Nepal.

    This same experience was repeated until each family member had a turn. Dinner ended only after we had a clear understanding of at least half a dozen such facts.

    As children, we thought very little about these educational wonders. Our family, however, was growing together, sharing experiences and participating in one another's education. And by looking at us, listening to us, respecting our input, affirming our value, giving us a sense of dignity, Papa was unquestionably our most influential teacher.

    Later during my training as a future teacher I studied with some of the most famous educators. They were imparting what Papa had known all along—the value of continual learning. His technique has served me well all my life. Not a single day has been wasted, though I can never tell when knowing the population of Nepal might prove useful.