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社会资本扩大再生产要求追加消费资料，反映这一要求的前提条件是（）。
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Mental Health and Aging Mental or psychological(psychology)health problems can increase with age. There are various_____（41）(reason).One is biological change which can interfere with the brain's ability to deal with_____（42）(inform).Another is social change such as_____（43）(retire)which can lead to a_____（44）(feel) of uselessness. Mental health problems can have a serious influence on an older person's ability. They may affect their ability to carry out many basic_____（45）(activity)of daily living, from getting up to_____（46）(manage) financial affairs. But problems often go without being_____（47）(solve).Many older people struggle on without the right help—or any help at all. Understanding how mental_____（48）(ill) tends to affect the elderly is vital in_____（49）(help) them to manage their problems_____（50）(effective)and reduce the risk of serious harm. _____.
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向社会困难群体提供最低生活保障的是（）。
长江是亚洲最长、世界上第三长的河流。长江流经多种不同的生态系统，是诸多濒危物种的栖息地，灌溉了中国五分之一的土地。长江流域(river basin)居住着中国三分之一的人口。长江在中国历史、文化和经济上起着很大的作用。长江三角洲(delta)产出多大20%的中国国民生产总值。几千年来，长江一直被用于供水、运输和工业生产。长江上还坐落着世界最大的水电站。
机关、单位执行上级确定的国家秘密事项，需要定密的，根据()确定。
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