阅读下面诗歌，回答（1）～（4）题。

麂子

牛汉

                                                                                                                       远远的

                                                                                                                       远远的

                                                                                                                       一只棕红色的麂子

                                                                                                                       在望不到边的

                                                                                                                       金黄的麦海里

                                                                                                                       一蹿一蹿地似飞似飘

                                                                                                                       朝这里奔跑

                                                                                                                       四面八方的人

                                                                                                                       都看见了你

                                                                                                                       用惊喜的目光

                                                                                                                       用赞叹的目光

                                                                                                                       用担忧的目光

                                                                                                                       麂子

                                                                                                                       远方来的麂子

                                                                                                                       你为什么生得这么灵巧美丽

                                                                                                                       你为什么这么天真无邪

                                                                                                                       你为什么莽撞地离开高高的山林

                                                                                                                        五六个猎人

                                                                                                                        正伏在草丛里

                                                                                                                        正伏在山丘上

                                                                                                                        枪口全对着你

                                                                                                                        哦，麂子

                                                                                                                        不要朝这里奔跑

一根水平放置的圆柱形输水管道横截面如图所示，其中有水部分水面宽0.8米，最深处水深0.2米，则此输水管道的直径是（   ）

在平面直角坐标系xOy中，以动圆经过点（1，0）且与直线x=﹣1相切，若该动圆圆心的轨迹为曲线E．

求曲线E的方程；

下列方程组中，解是$\left\{\begin{array}{c}x=-5\\ y=1\end{array}\right.$的是（　　）