如图乙所示，光线A、B是点光源S发出的两条光线经平面镜反射后的反射光线，请在图中作出平面镜的位置，并完成光路图。

非洲的刚果盆地是地球上热带雨林的三大分布区之一，目前该地雨林遭受到了史无前例的破坏，研究人员开展的研究显示：到2050年，森林砍伐可能导致刚果盆地气温上升0.7℃，将使温室气体造成的变暖加剧50%。近年来，对该区域的热带雨林进行大规模开发所产生的不利影响有(    )

①生物多样性减少    ②全球温室气体浓度上升，气候变暖      ③地下水位上升

④水土流失加剧，河流泥沙含量大     ⑤土地盐碱化、荒漠化加剧

    Every evening at six o'clock an old man goes to a restaurant near his house. He eats dinner. After dinner, he drinks coffee and talks to the people at the restaurant.

    The old man's name is Bill. Bill eats at the restaurant every evening because he is lonely. His wife died and he has no children.

    Every evening the same waitress(女服务员)brings Bill to his dinner. Her name is Cara. She is 17 years old. Cara is kind to Bill. She knows he is lonely, so she talks to him. If Bill is late for dinner, she calls him on the telephone. “Are you OK?” she asks him.

    One evening Bill doesn't come to the restaurant. Cara calls him, but he doesn't answer the phone. Cara calls the police. “Please go to Bill's house.” Cara tells the police. Later the police call Cara at the restaurant. “Bill died in his sleep,” the police tell her. Bill was 82 years old.

    A week later, a man comes to the restaurant. “I have something for Cara,” the man says. The man gives Cara a check(支票) for $500000. The money is from Bill.

“This money is for me? From Bill?” Cara asks the man.

    “Yes,” the man answers.

    “But…why?” Cara asks the man.

    “Bill liked you,” the man says. “You were kind to him”

如图，一只盛满水的塑料瓶，右侧开有a、b、c三个小孔，甲、乙分别为拧紧瓶盖和打开瓶盖时水流出的情形，从图可看出，a、b、c三个小孔，____孔水的流速最大，比较三孔水流情况可得出水____水的压强越大．