题目内容

急性肾小球‘肾炎发生水肿的主要原因是()

A. 肾小球滤过率降低
B. 肾小管重吸收增加
C. 大量血浆蛋白丢失
D. 继发性醛固酮增多
E. 继发性心功能不全

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对于企业发生的或有事项,通常不能确认或有资产,只有当相关经济利益基本确定能够流入企业时,才能作为资产予以确认。相反,相关的经济利益很可能流出企业而且构成现时义务时,应当及时确认为预计负债,这体现了会计信息质量的谨慎性要求。

A. 对
B. 错

下列说法正确的是______。

A. 速动比率比流动比率反映的短期偿债能力更可信,如果速动比率小于1,说明短期偿债能力弱
B. 影响速动比率可信性的重要因素是应收账款的变现能力
C. 现金比率表明1元流动负债有多少货币资金作为偿还保障
D. 现金流量比率表明每1元流动负债的流动资产保障程度

以下不属主死的恶色者为

A. 青如草兹
B. 黄如蟹腹
C. 赤如坏血
D. 白如枯骨
E. 黑如炱

Earth"s Inner CoreScientists have long struggled to understand what lies at the planet"s center. Direct observation of its center is impossible, so researchers must 1 to other evidence.In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves 2 jolts (晃动) from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist lnge Lehmann studied the waves" 3 to determine that within Earth"s core of molten (熔化了的) iron lies a solid inner core—but 4 that core was made of eluded (难倒) her. Other geophysicists quickly determined that Lehmann"s inner core was composed mostly 5 iron. Since then, Lehmann"s discovery has 6 conventional Earth science.But now scientists are challenging traditional theory with new and radical 7 . For example, Earth"s center could actually contain an "inner core within the inner core", claim Ishii and colleague Adam Dziewonski.Analyzing hundreds of thousands of earthquake wave 8 , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil 9 from the formation of Earth," says Dziewonski.Dziewonski and Ishii speculate that shortly 10 Earth formed around 4.8 billion years ago, a giant asteroid (小行星) smashed into the young planet and nearly melted it. But Earth"s center didn"t quite melt; it 11 mass as the planet cooled. The core within a core may be the kernel (核心) that endured. "Its presence could change our basic ideas about the 12 of the planet," Dziewonski says.Dziewonski"s idea is tame (温和的) compared to the 13 theories of independent geophysicist J. Marvin Herndon. Earth"s inner core is made not of iron, he claims, but a 14 of nickel and silicon. Herndon has a truly revolutionary notion: Within the nickel silicide (硅化物) inner core is also an "inner" inner core—an 8 km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms 15 fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.

A. size
B. origin
C. structure
D. shape

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