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Buying Online Why buy online? It's little wonder that new buyers quickly learn to love Internet shopping. At the moment, the best deals on the Web are in clothes, books, CDs, videos, flights and holidays. Advantages — Buying online does have a number of potential advantages: Price: items are usually cheaper on the Web because warehouse and staff costs are lower, and because online shops want to attract and keep customers. Convenience: shopping can be much easier on the Internet. It can be done at home, at a convenient time and be very quick. Wide choice: Internet shopping allows you access to a wide range of shops all around the world, some of which don't exist on the high street. Online shops also usually carry a much larger stock. Quick delivery: most Internet sites are able to deliver within a few days. Disadvantages — There are also some disadvantages buying online: Delivery: many sites still use traditional carriers and don't deliver at night or at weekends. Often you end up having to go and collect from a warehouse. Costs and returns: adding up transport and, if buying from outside the European Community, tax and duty, can often mean an item isn't as cheap as it seems. Returning a purchase often means having to parcel it up and take it down to the post office. Cost of using the Internet: although online access is getting cheaper, many Internet providers still charge per minute. Browsing around a wide range of shops can take as long as a traditional shopping visit, so beware. Buying more: because everything is at the click of a mouse, it's very easy to buy and spend more than you intended to. How to go about shopping online Most high-street names now have a presence online. These shops and other well-known Internet shopping sites are a good place to start, It's best to get used to buying online from a brand you already know and trust. Simply search for it under its own name, adding 'www' at the start and either '. com' or '. co. uk' at the end. If this doesn't work, most search engines and Internet shopping directories should be able to help. They'll also be the place to go if you're looking for a particular item. Most online shops work on the 'shopping basket' principle. You tour the site and click when you see something you want. The item gets placed into a virtual shopping basket. When you want to pay for the items in the basket, you'll be asked to register. You'll then be taken to a secure part of the site to give details of your credit or debit card. You're usually able to send a check instead, but this can mean a wait of a week or two, because the company will often want to clear the check before sending you the goods. Tips before you buy Pay by credit card because this may give you some additional protection. Only use debit cards when you're dealing with shops you know you can trust. When giving out these details, always ensure you're using a secure site. Do some real-world research as well as Internet research to compare prices. Internet prices may not always be the cheapest. Print out your order and keep any terms and conditions in a safe place along with the company's postal address and telephone number. Check the company's policy on returning goods. If you've bought the item from a site abroad, you may find returning it costly. Look out for loyalty schemes and email alerts where shops will contact you with bargains or new deals. Be careful about spending too long surfing for a bargain it can be addictive and costly. Security and privacy Security is far less of a problem than it appears if you ensure you only shop at websites that offer secure payment pr
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NG
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【多选题】关于人工主动免疫和人工被动免疫的比较,下列哪些说法是正确的
A.
人工主动免疫需要接种1~3次;人工被动免疫只需要接种1次
B.
人工主动免疫可维持数月或数年;人工被动免疫维持一个月
C.
人工主动免疫注射后2~4周出现免疫;人工被动免疫注射后立刻出现
D.
人工主动免疫主要用于预防;人工被动免疫多用于治疗或应急预防
E.
人工主动免疫的免疫物质是抗原;人工被动免疫的免疫物质是抗体等
【多选题】意识的反作用表现在()
A.
意识活动具有目的性和计划性
B.
意识活动具有创造性
C.
意识具有指导实践改造客观世界的作用
D.
意识具有客观性
【多选题】党在过渡时期总路线的理论依据( )。
A.
毛泽东为主要代表的中国共产党人在马克思列宁主义的理论指导下,积极探讨新民主主义革命胜利后中国社会逐步向社会主义过渡的问题
B.
列宁在指导俄国无产阶级革命和世界被压迫民族解放斗争中,进一步发展了马克思、恩格斯的革命转变思想
C.
新中国成立后,中国共产党又在马克思列宁主义关于过渡时期理论的指导下,依据中国的具体情况,适时制定了党在过渡时期的总路线。1953年毛泽东审阅通过了中央宣传部编写的《为动员一切力量把我国建设成为一个伟大的社会主义国家而斗争——关于党在过渡时期总路线的学习和宣传提纲》
D.
马克思、恩格斯在创立科学社会主义理论时,就提出了从资本主义社会向社会主义社会过渡的问题
【单选题】意识对物质的反作用表现在许多方面,以下哪方面不属于意识的能动作用的表现?
A.
意识是单方面被物质所决定的
B.
意识活动具有创造性
C.
意识能影响人的生理活动
D.
意识具有指导实践,从而改变世界的作用
【单选题】以下描述正确的是( )。
A.
人工主动免疫主要用于治疗
B.
人工主动免疫接种的物质为抗原
C.
人工主动免疫接种的物质为丙种球蛋白
D.
人工被动免疫不能用于治疗
E.
人工主动免疫主要用于紧急预防
【简答题】对白喉的人工主动免疫用________,人工被动免疫用________。
【简答题】人工主动免疫名词解释
【单选题】意识对物质的反作用表现在许多方面,以下哪方面不属于意识的能动作用的表现?
A.
意识能影响人的生理活动
B.
意识活动具有创造性
C.
意识是单方面被物质所决定的
D.
意识具有指导实践,从而改变世界的作用
【单选题】IgG通过胎盘为( )
A.
自然主动免疫
B.
自然被动免疫
C.
人工主动免疫
D.
人工被动免疫
E.
过继免疫
【单选题】胎儿从母体获得IgG属于
A.
过继免疫
B.
人工被动免疫
C.
自然被动免疫
D.
人工主动免疫
E.
自然主动免疫
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