Scientists believe that people "dressed up" long before they made a habit of wearing clothes. Primitive man dressed himself in feathers and ornaments, or painted his body and wrapped himself in animal skins. It was probably some time before man discovered that the decorations kept him warm and protected him from-various injuries. Even today, millions of people who wear little clothing use ornaments and decorations.
When primitive people began to wear clothing regularly, they had to make it from the materials at hand, In cold regions, they often used the skins of fur-bearing animals as protection against the cold. In warmer regions of the world, the people dressed themselves in clothing made from leaves, tree bark and woven grasses. Some people scraped the hair from animal skins to make soft leather for their clothes.
Linen was the first woven material from which clothes were made. From very early times, men have known how to make flax into fine linen. In
A. animal skins
B. leaves
C. woven grasses
D. flax
| Broadly speaking, the Englishman is a
quiet, shy, reserved person who is fully{{U}} (21) {{/U}}only among
people he knows well. In the presence of strangers or foreigners he often seams inhibited.{{U}} (22) {{/U}}embarrassed. You have only to{{U}} (23) {{/U}}a commuter train any morning or evening to see the truth of this. Serious looking businessmen and women sit reading their newspapers or dozing in a corner; no one speaks. In fact, to do so would seem most unusual.{{U}} (24) {{/U}}, there is here an unwritten but clearly understood code of behavior which.{{U}} (25) {{/U}}broken, makes the person immediately the object of{{U}} (26) {{/U}}. It is a well-known fact that the English have a{{U}} (27) {{/U}}for the discussion of their weather and that, given half a chance, they will talk about it{{U}} (28) {{/U}}. Some pe A. entertained B. relaxed C. amused D. enlightened [判断题]杆路的加固、防雷、防强电设施，每半年检修一次
A.正确 B.错误 [判断题]铁路高速线路允许的最高时速200～350km/h以下，铁路特高速线路允许的时速350km/h以上
A.正确 B.错误 [判断题]如果经调度允许的连续停电、夜间不送电的线路,工作地点的接地线可以不拆除,但次日恢复工作 前应派人检查
A.正确 B.错误 [单选题]直流电机中电枢的主要作用是
A.将交流电变为直流电 B.实现电能和机械能的转换 C.改善直流电机的换向 D.在气隙中产生磁通 [单项选择]患者因下前牙牙龈反复出现瘘管，X线片显示根管钙化，根尖周暗影较大，经过多次正规根管治疗根管不通，拟行根尖手术拆线后患者复诊时间应为（）
A. 1个月 B. 6个月 C. 12个月 D. A+B E. B+C [判断题]建立健全从业人员安全培训档案和企业安全培训档案,实行一人一档、一期一档。( )
A.正确 B.错误 [单选题]铁路技术设备检查中发现问题，要及时解决；对危及行车安全的，须（）采取措施；当时不能解决的，要安排计划，限期完成，并进行复查；需要上级解决的，要按程序上报。
A.立即 B.次日 C.三日内 D.当日 [判断题]在抢救触电者脱离电源时,未采取任何绝缘措施,救护人员不得直接触及触电者的皮肤或潮湿衣服。
A.正确 B.错误 [单项选择]在下列事项中，只有哪一项可以视为食品安全危害
A. 对消费者实施经济欺诈 B. 食品中含有金属碎片 C. 明显的食品包装损坏 D. 杀菌后的罐装食品中发现苍蝇 [单选题]1特种设备作业人员、特种作业人员、危险化学品从业人员未依法取得资格证书属于（）类严重违章。
A.Ⅰ类 B.Ⅱ类 C.Ⅲ类 D.以上均不是 [多选题]根据《物权法》，下列各项财产抵押的，抵押权自登记时设立的有（ ）。
A.交通运输工具 B.建筑物 C.生产设备、原材料 D.正在建造的船舶 E.建设用地使用权 [判断题]中央预告信号只有直流操作。( )
A.正确 B.错误 我来回答: 提交
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