“盛世”是指我国从大乱走向大治，在较长时间内保持繁荣昌盛的特定阶段。我国历史上曾出现过多个“盛世”。阅读下列材料，回答问题。

材料一  汉武帝执政时期，中国封建社会形成了辉煌的“西汉盛世”，汉武帝的伟大之处在于他的诸多首创精神和积极的治政态度……他两次派遣使团出使西域，最终凿通西域，建立起沟通中西交通的陆上要道，丰富和充实了华夏文明。

材料二  唐太宗开创的 “贞观之治” 昌盛局面， 在她统治时期继续向前发展， 国力强盛，为以后的“开元之治”──中国封建社会鼎盛时期的到来奠定了坚实的基础。史家称她的统治有“贞观遗风”，郭沫若称赞她的统治是“政启开元，治宏贞观”。

材料三  15世纪的中国是一个综合实力走在世界前列的强国，郑和七下西洋，没有侵略和掠夺，只有友谊交往和馈赠，是名副其实的和平与友谊之旅……数百年来，东南亚各国各种郑和庙宇香火旺盛，各种遗迹经久不损，各种传说历久不衰。

Will he come back to school tomorrow? I hope _____.

向日葵某细胞间隙液的浓度为A ，细胞液的浓度为B，细胞质基质的浓度为C，则当它因缺水而萎蔫时，三者之间的关系是（ )

在方框中填入一个恰当的词、或填入所给单词的适当形式，使短文通顺、正确、连贯。
    A lot of people wish to be slim, but at the same time they are____（worry）about their health. In fact, it is important for everyone to lose weight healthily. A strong body can keep you working in a high speed and make you more positive every day. However, how can you do it? Here's some good____（advice）.
    ●Drink plenty of water and eat____healthy diet. If you feel like____（eat）snacks, drink a glass of water first. If you are still hungry after 15____（minute）, then it's time for a light snack. Try to stay away from food with high calories, such as sweets and fast food.
    ●Do not eat____(much) than you can consume (消耗). People get fat because they can’t consume all the calories ____they get. So, knowing how many calories you really need is very important.
    ●Take enough exercise.  The  “333” is good   for you—exercise three____(time) a week, for at least 30 minutes at a time, and your pulse rate (脉搏率) should be more than 130 after____(exercise).
    Keep the three pieces of advice in mind and follow the advice. Then you'll____(sure) have a slim and strong body.

距今355前，“一代英雄，开辟荆榛，千秋功业，驱除荷虏。”。这“一代英雄”指的是（    ）