成人平均体重大约是65千克，15名成人的体重大约是____千克。

阅读材料，完成下列要求。

材料亚里士多德认为：“凡以政治修明著称于世的城邦无不对人口有所限制。最美的城邦，其大小必然有限度……一个城邦，如果像一个民族国家那样，人口太多了，虽然在物质需要方面的确可以充分自给，但它既难以构成一个真正的立宪政体，也就终于不能称为一个真正的城邦。”同样，孟德斯鸠也认为：“从自然特质来说，小国宜于实行共和政体，中等国宜于由开明的君主治理，而大帝国只能由一个专制君王来维持。”

根据材料概括亚里士多德及孟德斯鸠的观点，并对该观点表明态度（赞成、反对均可），要求：观点明确；结合材料和中外史实进行论证，史论结合。

有学者认为：“在近代中国，经济的转型主要表现为传统经济结构逐渐瓦解，资本主义近代工业从无到有的形成和发展。近代社会转型主要表现在使传统农业社会向近代工业社会过渡的工业化进程中。”对材料的理解最确切的观点是（    ）

岭﹣淮河线以北的植被类型主要是（　　）

    On March 14, maths and science lovers around the world celebrated a special day: Pi Day.

    Pi is____ to3. 14, but the number goes on endlessly. It is sometimes written in Greek,π. With the help of computers, mathematicians have been able to ____ pi out to over trillion (万亿) decimal places, but there is still no____ to the number. This makes pi puzzling, even for the most famous scientists and mathematicians.

    Pi Day is celebrated around the world on March 14, since how we write this date, 3/14,looks just like the number pi.

    For some people, the appeal (吸引力) of Pi Day goes far beyond maths and science. Pi shows up____popular culture. You can see it in movies, comics, music and more. "In modern movies, any time the filmmaker wants to evoke (产生) a sense of mystery, often the symbol pi is used, "says David Blatner, Jewish American writer of The Joy of Pi.