题目内容

醇类化合物都有羟基？

A. 对
B. 错

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判断各醇类型

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Lucas试剂加入下列醇中的现象

A) adolescence B) anticipate C) eases D) emerging E) exceeds F) fascinatingG) financially H) identify I) identity J) independently K) obligation L) optimisticM) positive N) stable O) typicalWho is an “adult”? Many would (1)___ having completed schooling, working steadily, living (2)_of one’s parents, marrying, and having children as the markers of adulthood, traditionally achieved between the late teens and the early thirties. However, compared with their parents’ generation, young people today are taking longer to complete their schooling, to settle into steady employment, to establish their own households, to get married, and to fulfil the (3)_to raise children. The psychologist Jeffrey Arnett describes the phase of life for those now between the ages of eighteen and twenty-five as a period of relative independence from social roles and expectations. As such, (4)_adulthood provides some younger people, especially those who have access to parental resources and supports into their twenties, with new opportunities for exploring their (5)_, particularly in the areas of work, love, and worldviews. Those who do not have resources, however, (6)_problems.Many observers have thought about the factors that have made the transition from (7)_to adulthood more complex and variable. Some believe that industrialization, improved health, and increased life expectancies have changed the(8)_life sequences of the early twentieth century. Others think that the rising cost of housing in some parts of the country explains why young people are increasingly likely to live with their parents. Still others suggest that because this generation’s parents has fewer children, they are able to provide support that(9)_the needs of each child, allowing their children to prolong their dependence and lengthening the time it takes them to complete their education and find (10)___employment and independent living arrangements.