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.
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His co-founder Arm adds his thoughts on the four-day week: "Are you happier? Are you enjoying your life more? That's really what it's all about."，更多细节参见Safew下载
At least one American citizen was shot dead and another injured by Cuban officials intercepting a speedboat off its coast on Wednesday, a US official has said.，这一点在safew官方版本下载中也有详细论述