我们要对自己有一个比较____的评估，包括评估自己的潜能，以判断____的方向。

锔瓷技艺

       ①锔瓷，是指陶瓷器修补技术。

       ②中国是瓷器的发源地。瓷器光亮圆润、坚固耐磨，因而广泛用于日常生活。但瓷器易碎，且无法通过粘合或捆绑复原。在生活水平底下的年代，市场有碎瓷再生的需求。同时瓷器可制成工艺品，有的晶莹剔透，有的大器沉雄。这些作品往往出自于大师之手，不可重复，不得再生，只有修补。于是，锔瓷技术便应运而生。

       ③锔瓷需要金刚钻，因为瓷器的硬度非常高，其它金属钻头都无法钻孔打眼，所以民间有“没有金刚钻，别揽瓷器活”的说法。

       ④锔瓷讲究精工细作。比如紫砂壶的锔补，因为壶壁较薄，锔钉眼的深度要控制在壶壁的一半，这种精确到毫米的工作，完全靠工匠的手感。用力稍欠，深度不够，则事倍功半；用力稍过，壶壁钻透，则前功尽弃。再如形似订书钉的“锔钉”，两只脚打入钉眼时角度要好，否则难看不说，天长日久就走形了。

       ⑤在将碎瓷修补完好的基础上，如何使这些再生之器看得上眼，就要讲点艺术了。因为单纯的修补只是匠活，而修复却不觉丑陋，再生而没有缺憾，就接近艺术了。乾隆年间兴起的“锔活秀”，要求锔匠们在修补瓷器时，重视对器具的装饰，能将镶嵌、锻打等工艺融入锔补拼接中。于是对瓷器进行镶边、雕花、包口、刻字等修饰工艺便产生了。

       ⑥“锔合以道”是这项技艺的顶峰，碎瓷的每一条裂纹，每一道缝隙都有它的走势和趋向，工匠的匠心在于通过艺术构思，运用精湛的手艺，在残缺的器物上完成二次创作，此时的作品雅性自然：破碎的纹路或直或斜，亦曲亦直，状如枝蔓，形似闪电，自然而生，看似有为却若无为，从而达到“补而不失其真，修而愈增其美”的化境。

       ⑦锔瓷技艺的起源已无法考证，但《清明上河图》描绘了锔匠做活的一幕，可见他至少跨越了千年历程。锔瓷是一门成人之美的手艺，每一次成功修复破损的物件，就像是修复一份破碎的感情，但社会在前进，伴随着中国工业化的发展和人民生活水平的提高，锔瓷技艺日渐式微，昔日串街走巷的锔瓷工匠，已经淡出人们的视野。

    First opened to the public in 1976,the California State Railroad Museum is one of Sacramento's largest and most popular visitor destinations.Over 500,000 people visit the museum every year,with guests traveling from throughout the world to experience this world-famous place.

    The museum consists of six original buildings.The main exhibit building,the Railroad History Museum,totals 100,000 square feet.Completed at a cost of US $16.1 million,it opened in May 1981.

    Hours: The museum is open daily (except on Thanksgiving,Christmas and New Year's Day) from 10 a.m. to 5 p.m. From May 28 to September 3,the museum will be open until eight o'clock in the evening.

    Admission: US $10 for adults,US $5 for youths aged six to seventeen;Children aged five and under are free; Cash,personal checks,traveler's checks and credit cards are accepted for payment.

    Location: The California State Railroad Museum is located at the corner of Second and “I” street in Old Sacramento.

    Parking: A limited number of spaces are available for parking on the streets near the museum.However,these spaces are not suitable for guests visiting longer than 90 minutes.All-day parking is available in the large public garage at the “I” Street entrance to Old Sacramento,for a small fee.

    Food Service: Many restaurants are located near the museum.These range from reasonably priced, family-friendly places to some of the finest dining restaurants in the city.

    Accessibility: The museum is fully accessible to people with disabilities.Certain exhibits and programs have limited accessibility,due to factors such as narrow and historic stairways.

    Photography: We welcome photography for personal use.Hand-held cameras are allowed;however,tripods are not permitted for safety reasons.A Morning for Photographers at the museum is a special event.Tripods are allowed during this event.

我们常听到以下说法：①生理盐水  ②高原缺氧 ③煤气中毒  ④胃酸过多．请从H，C，O，Na，Cl中选择合适的元素，书写化学式：

北京时间2014年4月2日7时46分智利西部沿海发生了8.2级地震，这里多发生地震的原因是位于（　　）交界处。