不结盟运动兴起的基础是（    ）

    Hello! My name is Jack. I'm 1Changsha. I'm in No.1 Middle School. It's 2good school. My school ID card 3 is 2016701. John is 4English friend. His 5name is Brown. John is in Changsha No.5 Middle School. We(我们) can 6in the evening. Sally and Jane are John's 7sisters(妹). Sally is 10. Her favorite (最喜欢的) 8is blue. Her cup and jacket are 9. Jane is 2. She can say "10are you?" to me now.

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        一屠晚归，担中肉尽，止有剩骨。途中两狼，缀行甚远。
        屠惧，投以骨。一狼得骨止，一狼仍从。复投之，后狼止而前狼又至。骨已尽矣，而两狼之并驱如故。
        屠大窘，恐前后受其敌。顾野有麦场，场主积薪其中，苫蔽成丘。屠乃奔倚其下，弛担持刀。狼不敢前，眈眈相向。
        少时，一狼径去，其一犬坐于前。久之，目似瞑，意暇甚。屠暴起，以刀劈狼首，又数刀毙之。方欲行，转视积薪后，一狼洞其中，意将隧入以攻其后也。身已半入，止露尻尾。屠自后断其股，亦毙之。乃悟前狼假寐，盖以诱敌。
        狼亦黠矣，而顷刻两毙，禽兽之变诈几何哉？止增笑耳。

I'm going to the library today. I need some ______ about trees.