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阅读理解。 You may have heard the term 'the American Dream'. In 1848, James W. Marshall found gold in California and people began having golden dreams. That 19th century 'American Dream' motivated the Gold Rush and gave California its nickname of the 'Golden State'. The American Dream drove not only 1800s gold-rush prospectors(采矿者)but also waves of immigrants throughout that century and the next. People from Europe, and a large number of Chinese, arrived in the US in the 19th century hoping that in America they would find gold in the streets. But most, instead, worked as railroad laborers. They created the oldest Chinatown, in San Francisco, and gave the city a Chinese name 'the old gold hill'. In the 20th century, some critics said that it was no longer possible to become prosperous through determination and hard work. Unfair education for students from poor families and racial discrimination almost made the American Dream a nightmare(噩梦). Then, in the 1990s, California saw a new wave of dreamers in Silicon Valley. People poured their energy into the Internet. This new chapter of the American Dream attracted many business people and young talents from China and India to form start-ups and seek fortune in America. Better pay, a nice house, and a rising standard of living will always be attractive. However, the new American Dream is no longer just about money. It encourages Americans to consume wisely to protect the environment, improve the quality of life, and promote social justice. The Governor of California, Arnold Schwarzenegger has become the model of the new American Dream. After years of hard work, he grew from a poor young man from Austria into a super movie star and then a governor. Many people hope his story can save the American Dream and give California a brighter future. 1. The 'American Dream' was appealing to _______________. A. Americans only. B. Chinese and Indians . C. Europeans. D. people all over the world 2. It can be inferred that ____________. A. America's golden dream could never be realized B. different times have different themes of the American dream C. America's golden dream brought great fortune to Chinese immigrants D. determination and hard work are the best way to realize the American dream 3. Why did most of the early immigrants work as railroad laborers? A. Because they could earn more money as railroad laborers. B. Because they thought railroad was the first step to find gold. C. Because railroad laborers were greatly honored at that time. D. Because they had to make a living by working as railroad laborers. 4. The underlined sentence in the last paragraph indicates that ___________. A. most of the immigrants to America don't reach their previous goals B. the dream of seeking fortune in America is easy to realize C. the success of Arnold Schwarzenegger is a common example of the immigrants D. the immigrants have made great contributions to California 5. Which may be the best title of the passage? A. Waves of Immigrants to America B. Hard Work Leads to Success C. Changes of America's Golden Dream D. Make Fortunes Abroad

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题目标签:采矿
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【单选题】排土场是露天矿山采矿排弃堆积物集中排放的场所。堆积物基底不稳引起滑坡的占30%以上,因而分析清楚滑坡原因,有利于采取针对性防治排土场滑坡的措施,造成沿基底接触面滑坡的原因是().

A.
基底为弱面、力学性质低于排土场物料的力学性质
B.
基底坚硬且接近水平、力学性质大于排土场物料的力学性质
C.
基底坡度较陡,其摩擦角大于排土场物料的内摩擦角
D.
基底坡度小于物料的内摩擦角,排土场高度载荷过大

【多选题】深海采矿装备系统包括( )。

A.
路面运输系统
B.
矿物输运系统
C.
水面支持系统
D.
矿物采集系统

【多选题】《矿山生态环境保护与污染防治技术政策》要求:禁止在依法划定的( )等区域内采矿。

A.
地质遗迹保护区
B.
基本农田保护区
C.
饮用水水源保护区
D.
重要湖泊周边
E.
自然保护区(核心区、缓冲区)