我们都有这样的生活经验：细细地咀嚼馒头时，会感觉到有甜味，这是为什么呢？小明同学设计了如下探究实验：
①取适量新鲜馒头，切成碎屑，分成2等份．
②将口漱净，取4毫升唾液放入小烧杯中．
③取2只洁净试管，编为1号和2号，分别加入等量馒头碎屑，然后向1号试管加入2毫升清水，向2号试管加入2毫升唾液，充分振荡，将两只试管同时放入37℃温水中10分钟．
④取出2只试管，分别滴加2滴碘液并摇匀，仔细观察试管中颜色的变化．
我们从生物圈提供的食物中，获得的营养物质主要是____ 、____、____、____ 、____ 、____．
2016年3月，十二届全国人大四次会议审议通过了《中华人民共和国慈善法》．《中华人民共和国慈善法（草案）》在2015年10月就通过中国人大网向社会公布并公开征求意见。社会各界人士充分发表意见，起草部门进行了上百次研讨才最终定下《草案》．社会各界人士充分发表意见，积极参与《慈善法（草案）》的修订，这说明了（ ）
①我国社会主义协商民主的独特优势
②公民通过社情民意反映制度行使监督权
③公民的政治参与意识在不断提升
④《慈善法（草案）》确保慈善组织公信力的提升
There are all kinds of machines. They 1 in many different ways. One kind of machine is called a computer. A computer can do many things. A computer can do math problems. People can also do math problems. But they cannot do it 2 a computer. Computers remember things. Computers do 3 people tell them. People cannot remember as many things as computers. Computers help tell 4 the weather will 5.Computers help fly rockets and spaceships. These are 6 of ways computers are used. They are used in7 ways. Some computers do just 8 things. Some computers can do a lot of things. There are 9 computers. There are big computers. There may be computers in your school. Do you 10 what they do?
