斗轮尾车系统油缸型号是什么?油缸伸缩速度是多少?

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问题:

斗轮尾车系统油缸型号是什么?油缸伸缩速度是多少?

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影响价值工程研究的因素包括( )。

A.研究小组的规模

B.研究小组的人员组成

C.价值工程小组中的组织者

D.资金

E.参与价值工程研究的设计人员

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某口服药物为使短时达到稳态血浓度,并维持体内药物量在D-2D(D为药物剂量)间,给药方案应采用()

A.首剂2D,维持量D/2t

B.首剂为D,维持量为D/t

C.首剂2D,维持量为2D/t

D.首剂2D,维持量2D/t

E.首剂2D,维持量D/t

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输尿管的第三个生理性狭窄位于()

A.肾盂与输尿管连接处

B.输尿管中段

C.跨过左髂总动脉与右髂外动脉处

D.进入膀胱壁内处

E.输尿管上段

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小环境对生物的影响大,大环境对生物的影响小。( )

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Who is poor in America This is a hard question to answer. Despite poverty’s messiness, we’ve measured progress against it by a single statistic: the federal poverty line. In 2008, the poverty threshold was $ 21,834 for a four-member family with two children under 18. By 1his measure, we haven’t made much progress. Except for recessions, when the poverty rate can rise to 15 percent, it’s stayed in a narrow range for decades. In 2007—the peak of the last business cycle—the poverty rate was 12.5 percent; one out of eight Americans was "poor. " In 1969, another business-cycle peak, the poverty rate was 12.1 percent. But the apparent lack of progress is misleading for two reasons.

First, it ignores immigration. Many immigrants are poor and low skilled. They add to the poor. From 1989 to 2007, about three quarters of the increase in the poverty population occurred among Hispanics—mostly immigrants, their children, and grandchildren. The poverty rate for blacks fell during this period, though it was still much too high (24.5 percent in 2007). Poverty "experts" don’t dwell on immigration, because it implies that more restrictive policies might reduce U.S. poverty.

Second, the poor’s material well-being has improved. The official poverty measure obscures this by counting only pretax cash income and ignoring other sources of support. These include the earned-income tax credit (a rebate to low-income workers), food stamps, health insurance (Medicaid), and housing subsidies. Although many poor live hand to mouth, they’ve participated in rising living standards. In 2005, 91 percent had microwaves, 79 percent air-conditioning, and 48 percent cell phones.

The existing poverty line could be improved by adding some income sources and subtracting some expenses (example: child care). Unfortunately, the administration’s proposal for a "supplemental poverty measure" in 2011—to complement, not replace, the existing poverty line—goes beyond that. The new poverty number would compound public confusion. It also raises questions about whether the statistic is tailored to favor a political agenda.

The "supplemental measure" ties the poverty threshold to what the poorest third of Americans spend on food, housing, clothing, and utilities. The actual threshold not yet calculated—will probably be higher than today’s poverty line. Moreover, this definition has strange consequences. Suppose that all Americans doubled their income tomorrow, and suppose that their spending on food, clothing, housing, and utilities also doubled. That would seem to signify less poverty—but not by the new poverty measure. It wouldn’t decline, because the poverty threshold would go up as spending went up. Many Americans would find this weird., people get richer, but "poverty" stays stuck.

What produces this outcome is a different view of poverty. The present concept is an absolute one: the poverty threshold reflects the amount estimated to meet basic needs. By contrast, the new measure embraces a relative notion of poverty: people are automatically poor if they’re a given distance from the top, even if their incomes are increasing.

What is the author’s attitude towards the new measure()

A. Negative

B. Positive

C. Objective

D. Matter-of-fact

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