完形填空

    Each morning during fifteen- minute bath, I determined to cultivate a b+添加知识点ig, happy smile. I found out it had to be an honest-to-goodness smile from down deep 1 , an outward expression of happiness from within!

        Let's see how the smile muscles 2 me during the day. I would think of the things I had to be 3 for, work up a big smile and then enter. It 4 people when I passed them on the street to give them a 5 smile. Give every living soul you meet the best smile you have 6 smiled in your life, and see how much better you feel and look. It's one of the best ways to 7 worrying, and start living. When I began to do this, I found I became more welcome everywhere.

①大力建设交通设施

②将东北建成重工业基地

③推行计划经济体制

④建立完整的工业体系

血小板是血液中数量最少、体积最小的血细胞，具有加速血液凝固和止血的作用。（ ）

牛通过吃草从草中获得化合物和元素，那么，牛和草体内的各种化学元素

第一次世界大战结束之际，意大利企业家阿格涅利提出，欧洲要想和平、强大，就必须借鉴美国的成功经验和失败教训，超越邦联阶段，建立联邦制的“欧洲合众国”。能够佐证上述观点的美国历史事实是(    )

①邦联政治结构松散，无力平息社会动荡 ②联邦剥夺了各州的自主权，稳定了统治秩序 ③邦联没有统一的关税，严重阻碍了经济发展  ④联邦统一发行货币，促进了经济的有序发展