题目内容
有丝分裂过程中细胞核增大，DNA含量倍增是在()。
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mRNA的前体转录产物称为()。
Questions are based on the following passage．
The ranks of the over 65s grew by 1.4m over the past decade．But old age will not be kind to all of them．One in three will develop dementia （痴呆）， around one in six will end up in a nursing or care home and nearly half will need some forms of care．Few will have laid plans to pay for it．
Knowing the dilemma of elderly voters， the government is moving to change that．Next year it will put ￡ 72，000 on the sum that a person will have to pay towards care．and will raise the means-testing threshold （阀值） from ￡ 23，250 to ￡118，000．
The government had hoped that this reform. would not just relieve elderly nerves but also stimulate an insurance market for end-of-life care．Unfortunately， that is not happening．
Many people continue to assume， wrongly， that the NHS will pay， says Yvonne Braun from the Association of British Insurers．And most are overly optimistic about their health in old age， underestimating （低估） the risks and costs they will suffer．Joan Costa-Font， from the London School of Economics， adds that the idea of care insurance seems to conflict with social values．A kind of familial moral hazard kicks in， as people fear their children will no longer look after them if they are insured．
Care costs are so hard to predict that insurers tend to protect themselves with big insurance expenses， making insurance difficult to afford．The government"s new policy， which was supposed to sort this out， comes with alarming warnings．It does not include the cost of bed and board， which makes up a large amount of care home costs．It is also up to local authorities to determine which care counts towards the policy， meaning people may end up spending more after all．And the policy is higher than the25，000-50，000 recommended to the government by Andrew Dilnot， an economist who reviewed the market．
From next month much will change for retirees， as the government drops the requirement to buy annuities with private pension pots．The government hopes that people will use the new flexibility to plan for their old age， including the possibility that their final years will be spent in a nursing home rather than on the Costa del Sol．
What is the government‘s objective in the reform？ 查看材料
20世纪60年代以前，大多数债券组合管理者采用的是（）。
维持细胞繁衍的方式是()。
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