定义某种运算$S=a\otimes b$，运算原理如上图所示，则式子$\left(2\tan \frac{5\mathrm{\pi }}{4}\right)\otimes \ln e+lg100\otimes {\left(\frac{1}{3}\right)}^{-1}$的值为（     ）

已知复数z=3+bi，b为正实数，且（z﹣2）²为纯虚数

（1）求复数z；

（2）若w=$\frac{z}{2+i}$，求复数w的模|w|．

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案．

    One night I saw something on the news that made me sad．It was1a group of homeless(无家可归的)people sleeping outside in the cold．

    So I decided to start a2to raise many for the homeless．I called it the Rock Club,At the beginning,there were only five members in it，3that quickly grew to about twenty．I didn't have to ask anyone if they wanted to be a4．In fact，they came up to me and asked me if they could5the club!

    We spent all of our free time on rock painting．We painted animals,flowers and even the names of sports teams on our rocks．We'd go around the school to6people who would buy them．By Christmas，we had raised thirty．three dollars and then we gave the money to a homeless shelter(收容所)in town．We all felt7that we could do something to help the homeless．

    A few days later,a newspaper reporter(记者)came to our school to8with us about our club and took a photo of us．The photo and article(文章) 9in the newspaper the next day．Later,10school,joined by three other schools，started a project for kids to help homeless shelters．

    Something as simple(简单的)as some painted rocks and a few caring kids made me know that I don't need much to make a difference．

***自诞生之日起，就开始领导中国人民探索中国革命道路、中国社会主义建设道路，勇敢的担当起带领中国人民创造幸福、实现中华民族的伟大复兴的历史使命。请阅读材料，回答问题：

材料一1921年，***诞生，中国革命面貌从此焕然一新。1927年，南昌起义、秋收起义后，***人深刻地认识到，苏联的革命道路在中国行不通，必须将重心转向农村，发展壮大自己，经过艰难抉择，***终于找到了一条使中国走向民族独立和人民解放的正确革命道路，最终***带领全国人民取得了新民主主义革命的伟大胜利，成立了新中国。

材料二社会主义制度建立以后，经过艰辛探索，***带领人民实现了历史性的伟大转折，开创了一条走向富国强民的道路。我国综合国力大幅提升，人民生活不断改善，谱写了中华民族发展史上最壮丽的篇章。