单项选择题

下列关于行政(法律)行为特征的说法正确的是（　　）。

A.行政行为的效力先定性是指行政行为一经作出，未被国家机关依法宣布为违法无效之前，任何组织和个人都必须遵守
B.行政行为的单方意志性仅体现在行政主体依职权进行的行为
C.行政行为的自由裁量性是因为法律具有不稳定性
D.行政行为的从属法律性体现在创制法律规范上

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A.需要重新鉴定的
B.被告人患有严重疾病，无法出庭的
C.起诉后被告人在法庭审理中脱逃的
D.由于当事人申请回避而不能进行审判的
E.检察人员发现提起公诉的案件需要补充侦查，提出建议的

单项选择题

We're bringing health care to where people live and work. So declared Larry Merlo,CEO of CVS Health,an American retail-pharmacy giant,announcing a$69 billion deal to buy Aetna,a heatth insurer.One rationale for the deal-assuming the regulators wave it through-is for the merged firm to develop personalised health care that people can easily get access to.There is another,more defensive,impetus behind the deal-the prospect of Amazon going into prescription medicine.The American pharmaceutical market is an alluring one for the online giant.It is large,worth$450 billion in 2016.And it is widely regarded as inefficient,leaving customers without good information about products they are buying.Compared with books,toys and other bulky items,the drugs market would appear to be a nirvana for Amazon.Prescription medicines weigh almost nothing,take up little space and can cost hundreds or thousands of dollars per pill.But three barriers block the road to this idyll.First,the sale and distribution of drugs is heavily regulated.Amazon would not be able to dump prescription drugs into the same fulfilment channels as its other products.It must acquire pharmaceutical licences for any state where it wishes to operate.Amazon would also need approval from the Food and Drug Administration at a federal level.Operating in a controlled industry would be a departure for a free-wheeling tech firm.Second,most drugs are paid for by insurers,not by consumers.The pharmacy-benefits managers（PBMs）,a sort of middlemen that buy drugs for insurers and companies,perform the complex task of matching purchases with patients'insurers,so that drugs are paid for.That is a source of the sort of opacity that Amazon would seek to remove.But the rcommerce firm would still need to handle issues of payment in the background,without keeping asking consumers for insurance details.Third,although drugs do come in small packages,their shipping and handling often require special attention.Many drugs must be kept cold throughout the supply chain.Others are dangerous,and must be kept in locked cages.Yet these drugs are often also the most expensive.If Amazon cherry-picks drugs that fit well into its existing network,it will miss out on a large slice of the market.Customers could find it confusing to be able to get some prescriptions through Amazon's store but not others.Amazon could find itself a partner,however.In July the boss of Express Scripts,a PBM,said it could use Amazon as an efficient provider in networks .Or Amazon could buy what it needs.It might buy Rite Aid,a big pharmacy chain,giving it licences,a cold-chain infrastructure and Rite Aid's small PBM in one swoop.A prospect like that goes a long way to explaining the marriage of CVS and Aetna.To sell drugs in America,Amazon must

A.acquireafederalpharmaceuricallicense
B.strengtheniisshippinginfrastructure
C.selectthosefittingintoitsexistingnetwork
D.stateclearlywhatprescriptionsithasinstore

下列关于行政(法律)行为特征的说法正确的是（ ）。

下列关于行政(法律)行为特征的说法正确的是（　　）。