清晨，逐渐变强的闹铃声吵醒了正在熟睡的小明，他把闹铃关掉，这是在____（填“人耳处”、 “传播过程中”或“声源处”）控制噪声的.这里所说的逐渐变强，指的是声音特性中的____改变了.一般情况下，声音在15℃空气中传播速度为____ m/s，当闹铃声逐渐变强的过程中，声音的传播速度____ (填“变大”、“变小”或“不变”)

The girl ______ at her brother because he broke her favourite glass. 　　

（Ⅰ）求点 $P$ 的轨迹 $C_2$ 的直角坐标方程；

（Ⅱ）已知 $A\left(0,3\right)$ , $B$ 是曲线 $C_2$ 上的一点且横坐标为 $2$ ，直线 $AB$ 与 $C_1$ 交于 $D,E$ 两点，试求 $\left|\left|AD\right|-\left|AE\right|\right|$ 的值．

    The last full moon of 2017 is going to appear a little bigger and brighter than most.

    Dec. 3 will bring a supermoon,____ (mean) a full moon that happens at perigee—the same time that the moon is closest to the earth.____this particular occasion, the moon will appear 7 percent larger and 16 percent brighter than usual. Not only will this be the only full supermoon of 2017,____it's also going to kick off a series of three full supermoons in a row. The full moons on Jan. 2 and Jan. 31 will be super ____(one) and even they'll be blue super moons,____means the second full moon in a single month.

    While some moonwatchers might be getting excited, some people think the hype（炒作）around supermoons isn't all it ____ (regard) as being. A scientist slammed（抨击）the term last year as something made up ____ (complete) and a waste of everyone's time. He acknowledged that supermoons would appear bigger and brighter, but that actually an amateur ____ (observe) wouldn't notice the difference. Another scientist ____ (make) a similar ____ (argue) back in 2012.

    If the supermoon makes you want to go out and appreciate the sky's beauty, we say “Go for it.”