圈闭是油气藏形成的基本条件之一，圈闭的类型决定着油气藏的类型；但圈闭的大小不影响其中的油气储量。
错误
暂无解析
保险合同终止的最普遍、最基本的原因是()
()属于射幸合同。
WehavereceivedyourenquiryofOctober15_____welearnthatyouareinterestedinourSewingMachines.
Wewouldappreciate____usabestpriceforthegoodsweenquired
Theletterofcreditshouldbeestablished____itsclauses____conformitywiththetermsandconditionsofthecontract.