在内华达州的拉斯维加斯这座小镇的西北方向,裸露岩石和干旱沙漠绵延不绝的景色中,可以见到地上有一些巨大的碗状圆坑。这就是1962年地下核试验形成的坑洞。美国能源部内华达国家安全区(原内华达核试验场)是美国最主要的核试验场。该场建于1950年底,曾进行过各种形式的大气层和地下核试验。该区现在仍在继续开展不发生爆炸的“次临界核试验”等地下核弹试验,维持并追求着美国的核战力。内华达核试验场先后进行了100[展开全部]
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In the backwoods of Ontario lies a town called Kinmount. This little hamlet of only a few hundred residents no longer has a gas station or a school; however, thanks to the singular vision of local septuagenarian Keith Stata, what it does boast is a five-screen cinema palace and memorabilia museum—one that welcomes upwards of 50,000 visitors every summer.
Join visionary philanthropist Bill Gates as he delves into pressing global issues and uncovers cutting-edge technologies that will transform the world.
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更多In the backwoods of Ontario lies a town called Kinmount. This little hamlet of only a few hundred residents no longer has a gas station or a school; however, thanks to the singular vision of local septuagenarian Keith Stata, what it does boast is a five-screen cinema palace and memorabilia museum—one that welcomes upwards of 50,000 visitors every summer.
Join visionary philanthropist Bill Gates as he delves into pressing global issues and uncovers cutting-edge technologies that will transform the world.