粮食：土地：种植A．学生：学校：知识 B．论文：论坛：发表 C．比赛：宣传：奖品 D

据报道，针对不少冬奥会运动员带伤参赛的情况，德国奥委会总干事米夏埃尔·费斯佩尔对奥运会“更快、更高、更强”的口号提出质疑。他认为“应该放弃‘更快、更高、更强’的原则，回归到体育最基本的理念——安全第一”。他呼吁各体育联合会根据顶级运动员和相对缺乏体育经验的运动员的不同需要，重新制定相应的规则和设施标准。 这段话要表达的中心意思是( )。

A．运动员带伤参加冬奥会违背奥林匹克精神

B．“更快、更高、更强”这一口号不适用于冬奥会

C．各体育联合会应该制定规则和设施标准以确保安全

D．奥运会应该回归安全第一的基本理念

适用于工程量不大，所占费用比例较小的那部分分项工程的估价方法是( )。

A．定额估价法

B．作业估价法

C．匡算估价法

D．概算估价法

发生换卡、挂失补发等业务，系统无法联动更新签约账号，需重新签约短信通。

小李在测定某滑轮组的机械效率时，得到下表中的两组数据。

序号	物重G/N	提升重物高度h/m	绳端拉力F/N	绳端移动距离s/m	机械效率η
1	6	0.1	2.5	0.4	60%
2	16	0.1	5	0.4	80%

（1）该实验采用的实验装置图应为图中的     （填“甲”或“乙”） 。

（2）比较两组实验数据可初步得出：使用同一滑轮组提升物体，物体所受的重力越大，滑轮组的机械效率越     （选填“高”或“低”） 。

Disability among the elderly has declined markedly in the United States in the past two decades. In 1984, 25 percent of the elderly population reported difficulty with activities associated with independent living. By 1999, the share had fallen to 20 percent, a decline of one-fifth. Although these basic facts are well known, their interpretation is not clear. Is the reduction in disability a result of improved medical care, individual behavioral changes, environmental modifications that allow the elderly to better function by themselves, or other demographic changes Will the trend continue, or is it time limited What does the reduction in disability mean for years of healthy life and labor force participation

The researchers David Cutler, Mary Beth Landrum, and Kate Stewart focus on disability caused by cardiovascular disease to investigate the role of improved medical care on reductions in disability. By looking at just one condition, they can analyze health shocks and their outcomes in some detail. Cardiovascular disease is a natural condition to analyze, because it is the most common cause of death in the United States and most other developed countries. Also, more is spent on cardiovascular disease than on any other condition, clearly a case where medical care could really matter.

The researchers measure disability as the presence of impairments in. Activities of Daily Living (ADLs) and Instrumental Activities of Daily Living (IADLs). Their data source, the National Long-Term Care Survey(NLTCS) , includes information on six ADL measures: eating, getting in or out of bed, walking around inside, dressing, bathing, and getting to or using the toilet. There are also questions about eight IADL measures: doing light housework or laundry, preparing meals, shopping for groceries, getting around outside, managing money, taking medications, and making telephone calls. The NLTCS is a nationally representative longitudinal survey of the health and disability profile of the population aged 65 and over.

Cutler and his co-researchers find that reduced disability associated with cardiovascular disease accounts for a significant part of the total reduction in disability--between 14 and 22 percent. The evidence suggests that improvements in medical care, including both increased use of relevant procedures and pharmaceuticals, led to a significant part of this decline in disability. Regions with higher use experienced substantial reductions in mortality and disability.

While precise data on the implications of reduced disability are lacking, the possible impact of disability reductions is staggering. The researchers estimate that preventing disability after an acute cardiovascular event can add as much as 3.7 years of quality-adjusted life expectancy, or perhaps $ 316,000 of value. The cost of this outcome is significantly smaller. The initial treatment costs range from $ 8,610 to $ 16,332, depending on the procedure used. Further, recent cost analyses reported that annual Medicare spending was lower for the non-disabled than the disabled, which suggests that higher treatment costs may be offset by lower future spending among a more healthy population. By virtually any measure, therefore, the researchers conclude that medical technology after acute cardiovascular episodes is worth the cost.

According to the text, the researchers’purpose is（）

A. to study disability caused by cardiovascular disease

B. to examine the effect of improved medical care on reductions in disability

C. to analyze cardiovascular disease and their outcomes

D. to study the cause of cardiovascular disease