The other day, I met an old man whose name was Ted, 91 years old. He told me about his____(believable) unusual story. He had lived through the Great Depression, served in the defence force and worked on____farm. He was so knowledgeable that he knew a lot in many areas of life. He was building model carts(手推车)that day. His pale hands reached out to a folder on the table, and he____(take) out some photos. In the photos I saw his collection of model carts. Ted took me through each photo and explained____was in each photo. He started telling me about how he cut steel____(build) his model carts. He seemed very____(enthusiasm). He gave me some valuable life____(lesson). He repeatedly kept saying that ____(learn) is very important in life.____(impress) by his love and enthusiasm for life at the age of 91, I realized that there can't be any barriers in life____we impose (把……强加于) those barriers on ourselves.

新生小鼠的脑神经元置于适宜的溶液中，制成较高细胞密度的细胞悬液，并将其低温保存，在低温保存过程中神经元会受到损伤．一段时间后，与常温保存组相比，溶液中的离子浓度变化是（　　）

海带是富有营养的一种食物，它是（    ）

古诗文名句默写。
①其间千二百里，                ，不以疾也。 

②                    ，江春入旧年。
③了却君王天下事，                      。 

④                  ，思而不学则殆。
⑤晴川历历汉阳树，                       。 

⑥                  ，听取蛙声一片。
⑦古人写诗有许多异曲同工之妙的佳句：“                  ，盛必虑衰”与孟子“然后知生于忧患，而死于安乐也”说的是同一个道理；范仲淹《渔家傲》中“千嶂里，长烟落日孤城闭”和王维《使至塞上》中：“大漠孤烟直，                  ”均显边塞独特风景；孟浩然《望洞庭湖赠张丞相》中“气蒸云梦泽，波撼岳阳城”和杜甫《登岳阳楼》中“                   ，                    ”都展示出洞庭湖雄浑的气势。

连词成句