【史书记史】

材料一：《汉书·张骞传》载：“然骞凿空，诸后使往者皆称博望侯，以为质于外国，外国由是信之。”

【看图说史】

材料二：

【材料析史】

材料三：通过这条道路，汉朝的丝绸、漆器等物品，以及开渠、凿井、铸铁等技术传到西域，西域的良种马、香料、玻璃、宝石等，以及核桃、葡萄、石榴、苜蓿等植物，以至多种乐器和歌舞等传入中国。

【今人沦史】

材料四：2017年7月14日，“2017．丝绸之路经济带核心区建设项目对接会”在新疆乌鲁木齐举行。此次项目对接会是贯彻落实******在“一带一路”国际合作高峰论坛上的演讲致辞精神、国家推进“一带一路”建设地方工作会议精神，以“弘扬‘丝路精神’，加快‘五大中心’建设”为主题，旨在搭建多方交流合作的投融资平台，形成各方交流合作的长效机制。

设二次函数y=ax²+bx+c（a＞0）的图象与x轴的两个交点A（x₁，0），B（x₂，0），抛物线的顶点为C，显然△ABC为等腰三角形．

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

      “Equal pay for equal work” is a phrase by the American women who feel they are ____ (fair) treated by society.They think it is not right for women to be paid less than men for the____ amount of work.Some people say men have ____  (many) duties than women.A married man has to earn money to support his family and make important ____ (decide)，so it is right for them to be paid more.Some are even against married women ____ (work) at all.When wives go out to work，they say，the home and children are given no attention ____ ．If women are encouraged by equal pay to take up jobs，they will be ____ (able) to do the things that they are best at doing：making a nice home and bringing ____ children.Women who disagree say that they want to escape from the limited place which society wishes them to fill and have ____ freedom to choose between a job and home life，____ a mixture of the two.In fact women have the right not only to equal pay but also to equal chances.

下列不属于植物组织培养特点的是