Venezuela's oil is also of poorer quality than its Saudi equivalent. Its sour, heavy crude is difficult to extract and refine, while its high sulphur content makes it corrosive to pipelines. A resurgence of Venezuela's industry could pose problems for Canada, which produces similarly viscous oil and exports much of it to the US, but analysts reckon the risk is minor.
Haise and Lovell worked frantically to boot up the lunar module, Aquarius.
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It's been designed by Notion, that could be a Google space different that helps groups craft higher ideas and collaborate effectively.
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BAS takes on up to 150 new recruits for Antarctica each year. While specialist science and engineering roles form the backbone, around 70% of the jobs are the operational roles required to keep the stations functioning.。safew官方下载对此有专业解读
// 易错点1：必须倒序遍历（正序无法正确缓存右侧的更大值）