[单选题]鸦片战争中清政府失败的根本原因是( )。
A.清政府的委曲求全
B.军事指挥出现失误
C.战争准备很不充分
D.中国的政治、经济、军事远远落后于西方国家

[填空题]{{B}}The Cinema{{/B}} The first moving pictures, developed in the 1890’s, were different from what we know about cinema today. Because the sound and pictures were not (1) ______ , in addition (1) ______. to the smallness of the screens, the kaleidoscope which his system was called, was only popularized in its (2) ______. (2) ______. The Frenchmen developed the same principle and succeeded in exporting their cinematography to Europe, India, Australia and Japan. But the films were (3) ______. (3) ______. After that, great advances were made in cinema. In 1903, with the use of moving cameras, an improvement on the fixed cameras, The Great Train Robbery, which lasted (4) ______. (4) ______. minutes, was made. In the following years, films were longer and the screens became larger and other refinements were introduced. In the early (5) ______, with the development of effective (5) ______.

[单选题] 在Windows 资源管理器中选定了文件或文件夹后,若要将它们复制到同一驱动器的文件夹中的操作是______
A. 按下Ctrl键拖动鼠标
B. 按下Shift键拖动鼠标
C. 直接拖动鼠标
D. 按下Alt键拖动鼠标

[单选题]高圧氧治疗一氧化碳中毒的主要机制是
A.血液中物理溶解氧量增加
B.血液中结合氧量增加
C.血液中血红蛋白增加
D.氧和血红蛋白的亲和力增加
E.机体的摄氧能力增强

[判断题]贮存大量浓盐酸的场所发生火灾,不能用直流水扑灭
A.正确
B.错误

[判断题]在电焊作业或其他有火花、熔融源等的场所使用的安全带或安全绳应有隔热防磨套。（）
A.正确
B.错误

[单选题]SH／T 0713汽油中苯及甲苯含量气相色谱法中，预分离柱老化最高温度为( )℃。
A.．100
B.150
C.170
D.．190

[单项选择]渔业上应用的浮子，绝大多数是泡沫浮子和硬质塑料浮子两种。其中泡沫塑料具有（）。
A. 具有浮力大、重量轻、渗水小等优点，但耐压性差
B. 具有浮力小、重量轻、渗水大等优点，但耐压性差
C. 具有浮力大、重量重、渗水小等优点，但耐压性好

[填空题]Because the air in the country is really clean, we ought to live
there much as possible. Since, however, a great deal of the world’s (1)
work must be done indoor in cities, it is important that we take every (2)
precaution to ventilate our houses properly. Some people have
thought that night air is injurious. But careful study shows that night
air is identical with which we breath during the day. In fact the (3)
proper ventilation of a bedroom is one of the first necessity for good (4)
health. Since the exhaled air is usually warmer and lighter than the
inhaled air, it rises to the top of the room. Therefore it is better to
open a window both at the top to let the warm up air out and also at (5)
the bottom to admit the fresh air in. Of course, this does not mean