要繁荣文艺创作,坚持思想精深、艺术精湛、制作精良相统一,加强现实题材创作,不断推出讴歌党、讴歌祖国、讴歌人民、讴歌英雄的精品力作。()
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泡沫灭火系统按系统结构可分为固定泡沫灭火系统、半固定泡沫灭火系统、移动泡沫灭 火系统、移动泡沬灭火系统。半固定灭火系统是指()。
A. 采用泡沬枪、固定泡沫设置和固定消防水泵供应泡沫混合液的灭火系统
B. 泡沬产生器和部分连接管道固定,采用泡沬消防车或机动消防泵,用水带供应泡沬混 合液的灭火系统
C. 泡沫产生器部分连接管道连接,固定消防水泵供应泡沬混合液的灭火系统
D. 采用泡沬枪,泡沬液由消防车供应,水由固定泊防水泵供应的灭火系统
生产经营单位是本单位安全生产的责任主体,其主要负责人是第一责任人,但不必负全面责任。()
符合维生素B2的理化特点的是()。
A. 碱性环境中稳定
B. 酸性环境中不稳定
C. 在紫外线照射下易分解
D. 有亚硫酸盐存在时易分解
E. 有Cu2+、Fe3+存在时易被破坏
21. According to the passage , all monkey troops are equal.
22. People have long been interested in animal behavior.
23. The last sentence of Para. I means that they are only regarded as evidence for the remarkable variety of nature.
24. The second paragraph mainly tells about the superficial aspects of social behavior.
25. The third paragraph mainly tells about what affects the formation of one' s behavior. towards one' s fellows.
26. More and more scientists participating in the study of sociobiology arc convinced that human behavior. arises almost entirely from unique intellectual and emotional capacities.
27. Some scientists believe sociobiology would affect their theories and practices.
28. Sociobiology mainly studies modem human society.
29. Scientists believe that animals have similar behavioral patterns.
30. Darwinian theory plays a key role in the study of animal behavior.according to the passage.