听力原文: Years ago before there were refrigerators, an icehouse was a building used for storing ice. The first icehouses were in the cellars of farmhouses. Pieces of ice, mixed with snow and meadow grass, were piled in winter and kept until the following summer. Soon farmers began to build separate houses for storing ice. These icehouses had double walls with hay stuffed between to keep out any heat. Blocks of ice were put inside the icehouse and packed with straw or sawdust.
Where did the ice for these icehouses come from? Workers took it from a frozen pond or river. They sawed the ice into even blocks. Then they pulled the ice blocks from the water with hooks and carried them to the icehouses on sleds. Special tools helped the workers cut and handle the ice. Ice axes chopped large holes !n the ice. Ice saws cut the ice into even blocks. Choppers loosened these blocks from one another. Ice hooks fastened themselves into the large blocks. Then they could be carried over the frozen surface of the pond or river. Tongs were used to pick up the smaller blocks of ice. Ships carded ice all over the world. In 1799 the first boatload in the United States was sent from New York City to icehouses in New Orleans, Louisiana. A boatload was sent from Boston, Massachusetts, to the West Indies to help fight yellow fever in 1805. Ice merchants in Boston also shipped tons of ice from ponds and rivers to cities in Europe.
(30)
A.Separate houses were built for storing ice.
B.Double walls were built in icehouses to keep cool.
C.Blocks of ice were packed with weed in icehouses.
D.Ice was put into icehouses in winter.
第1题
急性一氧化碳中毒恢复后2~60天内可出现下列何种症状()
A.痴呆
B.震颤麻痹综合征
C.偏瘫
D.失语
E.以上都对
第2题
急性CO中毒恢复后2—60天内可出现下列何种症状
A.痴呆
B.震颤麻痹综合征
C.偏瘫
D.失语
E.以上都对
第5题
老年人服用甲状腺素过量时,可出现下列哪一种不良反应
A.心绞痛和心肌梗死
B.血管神经栓塞性水肿
C.甲状腺功熊不全
D.致癌作用
E.粒细胞缺乏症
第6题
酮症酸中毒可出现下列何种呼吸
A、潮式呼吸
B、间停呼吸
C、库斯莫尔呼吸
D、叹气样呼吸
E、点头呼吸
第7题
胰岛细胞瘤时可出现下列何种结果()
A.血脂明显上升
B.血脂明显下降
C.血糖明显升高
D.血糖明显降低
E.血糖不变
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!