填空

0.4×0.3＝____

4.2÷0.5＝____

0.15×0.4＝____

现代生活中人们越来越注意微量元素的摄入。血红蛋白中的铁是人体内氧的输送者，缺铁易患贫血。

阅读理解                                                           

                                                                Table manners in America

        Don't circle your plate with your arms. If you do so, you will become the focus  (焦点)  of the table. Everyone would wonder, "Is there anything wrong with the food?" This may give a wrong message that you don't like the food or something like that.

       Don't push the plate back when finished. Leave it where it was. Do you want to let the hostess (女主人)(1)_________(know ) that you've just done a labours。

        Don't lean (倚靠) back and say "I'm through" or "I'm full". Just put the fork and knife across the plate. That's all. 

       (2)Don't cut up everything before you start to eat. Cut only one or two bites (块) at a time. Never take a huge mouthful of anything. Do you want to show how hungry you are? Don't do that. It's not so good.

        It's never good to reach across the table for anything. If the thing you want is not at hand, simply ask the nearest person for help, like "(3) Mrs. Smith, could you pass me the dish?"

阅读材料，完成下列要求。

材料一：早在1624年，英国法律就明确规定：把专利权授予最早的发明者。到1851年，美国总共颁发了13023项专利，促进和保护了私人发明。1687年牛顿出版了《自然哲学的数学原理》，他通过自己的实践，沟通了技术和科学之间的鸿沟，开启了工业革命的大门。科学和经济的发展需要思想自由……还取决于政治的稳定，从17世纪末起美国就保持稳定，即使是1832年资产阶级不同集团的权益之争，也是在议会中以和平的方式实现的。

——摘编自《大国的崛起》

材料二：伤哉贫也！欲购奇考证，而乞洛下之资，欲招致同人，商略赝真，而缺陈思之馆。（想加以验证而无钱，想和同仁们讨论真伪而无场馆）……丐大业文人，弃掷案头，此书予功名进取，毫不相关也。

——宋应星《天工开物·序》（初刊于1637年）