最新热播剧《鸡毛飞上天》真实反映出经历改革开放后，义乌的年轻人身上出现的问题与困惑，展现了中华商业传奇。该剧主人公陈江河成功创业的有利背景有（    ）

①对外开放是我国的基本国策             ②世界经济技术的发展规律

③“走出去”是义乌发展的根本基点      ④经济全球化的迅猛发展

已知在平面直角坐标系xOy内，点P（x，y）在曲线C： $\{\begin{array}{c}x=1+\cos \theta \\ y=\sin \theta \end{array}(\theta$ 为参数，θ∈R）上运动．以Ox为极轴建立极坐标系，直线l的极坐标方程为 $\rho \cos \left(\theta +\frac{\pi }{4}\right)=0$ ．

（Ⅰ）写出曲线C的标准方程和直线l的直角坐标方程；

（Ⅱ）若直线l与曲线C相交于A、B两点，点M在曲线C上移动，试求△ABM面积的最大值，并求此时M点的坐标．

下列关于动物为学习行为的叙述，错误的是（　　）

Hi, Tommy,

    Guess what? I got an “A” on my English test. I always get good grades in English now and I'm sure this is because I often write letters to you in English. Most students in my class don't use English outside of the classroom or in their homework. It's a foreign language for them. For me, it is a second language, because I read a lot in English and I write letters to you in English, too.

    The weather is very cold here but I love snow. There is also a lake near my home. I often skate on the lake in winter because it freezes in winter and the ice is thick enough to skate on.

    It was my birthday last week and I had a party with my friends. But I was sad that you weren't there.

    It's great to have a pen friend like you. Do you think we will meet in the future? If you come to France to visit me, my parents will really like it and you can stay with us, and also we will have a great time because I will show you all interesting places in Pairs. The best time to come is in spring. The weather isn't too hot or too cold then. Do you have any vacations in spring? Would Easter be a good time for you to come?

    Please write soon, I am looking forward to your coming quickly.

Best wishes,

Jean Colin