下面句中空白处，依次填入的词语最恰当的一项是（     ）

在年画村里走了几圈，我很有些感慨。大地震震垮了村庄，但没有震断年画木板上那些飘逸而又    ①   的线条，几百年来，这些独具特色的线条融进了绵竹民间画家们的智慧，更刻进了他们生命的    ②   与意志。年画的销量少了，但他们坚守在作坊里劳作不断，因为这是他们祖上的祖上传下来的遗产，是名播华夏的千金万金也难买的宝贵遗产。

画“填水脚”时，因时间短促，容不得细描慢抹，艺人全凭真功夫    ③   ，笔锋奔放雄健、神韵十足，别具洗炼、概括之情趣。“填水脚”以它的天真、质朴、粗犷而成为绵竹年画中的珍品。

古代雅典高度崇尚知识和大演说家辈出，主要由于 (    )                                         

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    Interested in getting ahead over the summer? Then stay on course by taking advantage of Alvernia's Summer Session. It lets you get ahead with a large selection of undergraduate and graduate courses. You can attend the class in classrooms or online, or you can take blended (混合的) courses if you like. We offer several flexible sessions at all three locations in the summer to help move you closer toward graduation. All courses are officially recognized and credits you earn are transferable (可转移的).
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已知△ABC是等边三角形，D是BC边上的一个动点（点D不与B，C重合）△ADF是以AD为边的等边三角形，过点F作BC的平行线交射线AC于点E，连接BF．

沿着以丝绸命名的中外交往通道，古代中外经济文化交流由此展开。

材料一：  （汉代）丝绸之路以商队运输形式从中国到罗马帝国，连接了欧亚大陆的两端。丝绸之路流通着大量的、品种多样的手工业品和农产品。商人、传教士和其它一些旅行者，也带着他们的信仰、价值观念和宗教信念来自遥远的西方。——杰里·本特利《新全球史》

材料二：  中国丝绸从海路外传虽然开始很早，但只限于官方贸易。到宋代除官方丝绸贸易外，民间商人向海外进行丝绸贸易的，也蓬勃发展。据泉州商人李充的原文报告“自置船一只携带各种丝绸和瓷器到日本贸易。” ——万明《海上丝绸之路与中外文化交流》

材料三：  据中新网北京3月31日电，英、发、意、德等许多西方国家纷纷摆脱美国的阻拦，成为“亚洲基础设施投资银行”意向创始成员国。目前已增至30个，另有14个国家也已提出了正式申请。