如图，已知正五边形ABCDE，AF∥CD，交DB的延长线于点F，则∠DFA=____度．

下列各句中划线成语的使用，全都正确的一项是（    ）

①木心研究者陇菲先生认为，《木心谈木心》涉及谋篇布局、遣词造句、焊接文白、应对采访等诸多方面，细心教学生如何写作，可谓金针度人。

②北京市水利规划设计研究院副总工程师穆永梅表示，南干渠所有分水口的检修阀、调流阀、流量计全部采用的是钢制管材，可做到滴水不漏。

③家长可以参与学校的管理，并提出积极的建议，但绝不能越俎代庖，学校也不应该在所谓的“家校合作”的名义下，将学校自身事务转嫁给家长。

④中国彩电产业的发展，基本上已经形成了显示技术派、低价格派、用户派三大阵营分庭抗礼的格局，短期来看，这种竞争格局将会保持相对稳定。

⑤高校加强创业教育不能南辕北辙，过于强调创业之“术”，而忽视创业之“道”，简单地以创业成败论英雄，是违背立德树人这一培养原则的。

⑥现在一些高校的行政管理人员已经到了肆无忌惮的地步，对学者发表的文章深文周纳，无限上纲上线，试图形成“寒蝉效应”。

古诗文默写。

下面的材料A—D分别介绍了四个不同的地方，请根据材料完成后面的题，并将答题卡内相应的字母涂黑。
A. Here is Jilin Children's Hospital .It is at 135 Jiling Street Jilin City. There are many advanced equipment about children. Zhao Weibing is a famous doctor. His telephone number is  (0432) 6983245. And E-mail is Zhaoweibing@sohu. com.
B. HongXing Supermarket lies in the center of Wanda. Lots of goods are sold. Foods, vegetables and fruits are for sale now. On the second floor, Some clothes for children are on sale, and the price is the lowest of all.. Welcome to choose.
C. The Painting on World of Sports . In the city center lies a famous stadium where the first-class sportsmen are training for the coming games. You are  allowed to take some pictures of them when they are training.
D.This is Jiling Jiajia Company. It is at 35 Jiling Street Jilin City.There are lots of compers and mobile phones here. We can also repair these machines. Li Weihua is  a computer engineer. His telephone number is (0432)2458988. E-mail: 1 wh988@263.com.

先化简，再求值：${\left(a+2\right)}^2-\left(a+3\right)\left(a-3\right)$，其中$a=-\frac{3}{2}$．