为了延长水果的存放时间，果农先将水果浸没到自己配制的保鲜液中，再用保鲜纸包住就能存放比较长的时间。若将同一个苹果先后放入甲乙两个容器的保鲜液中，静止后苹果的浮沉情况如右下图所示，则甲乙两容器中保鲜液的密度大小比较，正确的是
A．甲中的大
B．乙中的大
C．一样大
D．条件不够，不能比较
答案：A
题目分析：同一苹果在甲、乙两个容器中分别处于漂浮和悬浮状态，F浮=G物，由阿基米德原理知
得
，观察图甲、乙可知甲图中排开液体的体积小于乙图中排开液体的体积，所以甲中保鲜液的密度比乙中大，对照各选项，A正确，选填A。
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| Fiercely independent, 90 year-old Vincenzia Rinaldi wouldn’t consider a home health aide or nursing home. So Louis Critelli, her nephew had to coax the widowed homemaker into assisted living, the nation’s growing long-term care option for the elderly. For $1, 100 a month, Rinaldi became the reluctant resident of an efficiency unit where she could still simmer her much-loved tomato sauce and where caregivers would make sure she took her pills. Instead, 30 months later, she died. Not because she was old. But because aides at her new home, Loretto Utica Center, one of the modern, hotel-style facilities that have sprouted across the country over the past decade, mistakenly gave her another resident’s prescription medication. That error led to her death, state inspectors concluded. Neither the state nor Loretto told her nephew about the cause of death. Critelli, thinking his aunt had been properly cared for, only learned of the finding years later from USA TODAY. "When they find something blatant like that, you’d think they’d tell the family," the shaken nephew told a reporter after a long pause. A USA TODAY investigation shows that Rinaldi’s death represents the tragic extreme in a pattern of mistakes and violations that lead to scores of injuries and occasional deaths among the estimated 1 million elderly residents of assisted living facilities. The centers are the state regulated, largely private-pay residences that help seniors with medication and other activities of daily life. In a wide ranging analysis, USA TODAY reviewed two years of inspection records within 2000-02 for more than 5,300 assisted living facilities in seven states: Alabama, Arizona, Colorado, Florida, Indiana, New York and Texas. The precise time period varied slightly from state to state. The analysis covered a broad range--from mom-and-pop facilities with just a few residents to corporate run centers with scores of beds and ’many levels of care. It is the first time such data have been gathered and analyzed across so many states. The review included less-detailed data from five other states and focused on broad quality-of-care categories to compensate for variations in regulations from state to state. As affluent and middle-class Americans cope with the infirmities of age, many turn to assisted living as an alternative to a nursing home industry that has been periodically plagued by abuse or neglect scandals. Even though assisted living facilities generally don’t provide 24- hour skilled medical care, they increasingly serve seniors who only a decade ago might have been in nursing homes. |