新型石墨烯超级电池，具有体积轻、不易燃、低成本、量产容易等特点。将其用作电动车电池，可实现充电7秒钟，行驶35公里的效果。“超级电池”还可广泛应用于现有混合电动汽车等设备。“超级电池”的成功研制说明（       ）

①只有反映事物本质的意识才具有能动性、创造性

②人能够认识事物的本质并根据自身需要加以利用

③人为事物具有自在事物无可比拟的优越性

④人能够将观念中的对象变成现实的东西

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    Xiao Lin has a good friend. Her 1 is Lucy. She is from the USA. She's a(n) 2. Xiao Lin and Lucy  3 in the same class. They go to school five days a4. They stay at  5 on Saturday and Sunday. Lucy 6 China and Chinese food. Her favorite  7 is rice cake. At school they play football after class. Xiao Lin and Lucy like 8 things. Now they are making a plane. They like flying planes on Saturday and Sunday. Lucy 9 English and a little Chinese. They are  10 friends.

x=3和x=﹣6中， ____是方程x﹣3（x+2）=6的解．