这里“拥有一流的电影制作技术和拍摄场地，汇集了‘梦工厂’等著名电影公司，以奥斯卡金像奖颁奖典礼闻名世界”。根据上述内容推断，这一地点是(     )

根据短文理解完成下列各题。
C
    Tom is a junior high student. He is good at some subjects but his favourite subject is chemistry. Yesterday he met some trouble when he had his chemistry class.
    At that moment, Tom was doing an experiment in class. He tried twenty times, but he couldn't succeed. So he decided to stop doing the experiment. He felt really unhappy.
    His teacher came up to him and asked why he was unhappy. Tom said, "All my work is in vain (白费力气). I fail twenty times and I get nothing."
    Tom's teacher touched Tom's head with a smile. He said to Tom, "Oh, you do a lot and you can get a lot from the mistakes. At least, you know that there are twenty ways you can't use to do this experiment."
    After hearing the teacher's words, Tom became excited. He kept doing the experiment, improved his methods, and he succeeded at last.

黄土高原南连秦岭，北抵长城，西起乌鞘岭，东至（  ）。

各级法律____中心可以为我们无偿提供法律上的援助。

某实验小组的同学用图所示的实验装置进行电解反应，电解槽内装有KI﹣淀粉溶液，中间用阴离子交换膜隔开．在一定的电压下通电，发现左侧溶液变蓝色，一段时间后，蓝色逐渐变浅．

已知：3I₂+6OH^﹣═IO₃^﹣+5I^﹣+3H₂O

回答下列问题：