下列物质或用品均为生活中常见物质：
①钙片、②不锈钢锅、③活性炭、④汽油、⑤食盐、⑥塑料水杯 
请用序号回答下列问题：
（1）为防止骨质疏松，人体可以摄入的物质是{#blank#}1{#/blank#} 
（2）常用作调味品的是{#blank#}2{#/blank#} ，能除去冰箱内异味的是{#blank#}3{#/blank#} 
（3）所使用的主要材料中，属于有机合成材料的是{#blank#}4{#/blank#} 属于金属材料的是{#blank#}5{#/blank#} 

    Some people have very good memories and can easily learn quite long poem（诗歌）by heart. Some people have1memories and can only2things that they have said again and again.
    The3English writer Charles Dickens said that he could walk down 4 street in London and then tell you the name of every shop on5sides of the street. Great men in the world have wonderful memories.
    A good memory is a great help in learning a language. Everybody learns 6language by remembering what he hears7he is a small child. Some children live with their parents in foreign countries and they seem8two languages as9as one. In school it is not so easy to learn foreign languages10students have little time11 it and they are busy with other subjects as well.
    A man's mind is quite like a camera but it12photos of what we see and it can also take photos of what we feel, hear, smell and taste. When we take a real photo13a camera there is much work14before the photo is finished and ready to show to our friends.15 the same way there is much work to do before we can keep a picture forever in our mind.

Today’s young people are taking a more active part in online activities. Although the Internet can be 1for students to collect information and communicate（交流）with their friends, teachers and parents are becoming more and more 2 about the unhealthy web content（网上内容）in the bar. They think that the birth of “Harm-free Internet Bars”（健康网吧）is3 step to4teenagers.
It was Sunday afternoon and there were not many 5 seats left in the Feiyu Internet Bar. A few6 were found playing 7. A person of the bar was walking around 8 Internet users’ online activities.
“My job is to find anyone who is looking at9 websites and then 10them from doing so,” he said. “This is a 11 of the ‘Harm-free Internet Bar’project”. Feiyu, a famous Internet bar in Beijing is among the first 19 to12 the harm-free Internet bar club.
In order to help start a better 13 for teenagers’ online activities, China’s Communist Youth League has brought out the program named “Harm-free Internet Bar for Teens”.
But while teachers and parents14the “harm-free Internet bars”,15 do many school students think of them?

Today’s young people are taking a more active part in online activities. Although the Internet can be 1for students to collect information and communicate（交流）with their friends, teachers and parents are becoming more and more 2 about the unhealthy web content（网上内容）in the bar. They think that the birth of “Harm-free Internet Bars”（健康网吧）is3 step to4teenagers.
It was Sunday afternoon and there were not many 5 seats left in the Feiyu Internet Bar. A few6 were found playing 7. A person of the bar was walking around 8 Internet users’ online activities.
“My job is to find anyone who is looking at9 websites and then 10them from doing so,” he said. “This is a 11 of the ‘Harm-free Internet Bar’project”. Feiyu, a famous Internet bar in Beijing is among the first 19 to12 the harm-free Internet bar club.
In order to help start a better 13 for teenagers’ online activities, China’s Communist Youth League has brought out the program named “Harm-free Internet Bar for Teens”.
But while teachers and parents14the “harm-free Internet bars”,15 do many school students think of them?