单项选择题

根据《安全生产法》的规定，生产经营单位发生重大生产安全事故时，其主要负责人不立即组织抢救或者在事故调查处理期间擅离职守或者逃匿的，给予（ ）处分，对逃匿的处15日以下拘留。

A.撤职
B.降级、撤职
C.记过、降级
D.降职、撤职
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单项选择题
根据《尾矿库安全监督管理规定》，关于尾矿库回采和闭库的说法中，不正确的是（ ）。
A.尾矿库运行到设计最终标高或者不再进行排尾作业的，应当在一年内完成闭库
B.特殊情况不能按期完成闭库的，应当报经相应的安全生产监督管理部门同意后方可延期，但延长期限不得超过6个月
C.尾矿库运行到设计最终标高的前6个月内，生产经营单位应当进行闭库前的安全现状评价和闭库设计
D.尾矿回采再利用工程应当进行回采勘察、安全预评价和回采设计
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听力原文：M: So, what is your biology project about?W: It is about microorganisms that live by chemosynthesis.M: Err...what's chemosynthesis?W: Well, it's pretty complicateD.You know how most life on Earth depends either directly or indirectly on sunlight?M: You mean like plants get energy directly from sunlight, and animals eat plants, so they depend indirectly on sunlight?W: Right. But down on the ocean floor, there is no sunlight. In some places though, there are hydrothermal vents, which are small cracks on the ocean floor. And these vents release heat and minerals from the inside of the Earth into the seawater. And all along the vents there are these unusual microorganisms. They are called archaean. And these archaean use chemical reactions to get their energy from the minerals. The minerals that are released by the vents. So their energy comes from chemical reactions, not sunlight.M: So chemosynthesis is getting their energy from chemicals?W: That's right.M: That makes archaean very different from other forms of lifE.W: And their genetic makeup is very different, too. They are one sort of organisms just like bacteria are, but genetically they are as different from bacteria as we humans arE.M: Wah, that's a really interesting project.(23)A.How hydrothermal vents are formeD.B.How living things get energy from sunlight.C.The harmful effects of certain chemicals in the ocean.D.Microorganisms that get energy from chemical reactions.
A.M:
B...what's
C.
M:
D.
M:
E.
W:
F.
M:
G.
(23)
A.How
H.
B.How
I.
C.The
J.
D.Microorganisms
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