[单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard. A. There is no greenhouse gas now, since it has been well under control. B. Now the production of CFCs used in refrigerators is only one third of that in the mid- 1980s. C. Oxides of sulfur can lead to acid rain and smog. D. The amount of lead, soot and carbon monoxide that are sent out has been reduced sharply.
[多项选择]申请《医疗器械经营企业许可证》应当同时具备（）条件。 A. 具有与经营规模和经营范围相适应的质量管理机构或者专职质量管理人员。质量管理人员应当具有国家认可的相关专业学历或者职称 B. 具有与经营规模和经营范围相适应的相对独立的经营场所；相适应的储存条件，包括具有符合医疗器械产品特性要求的储存设施、设备 C. 应当建立健全产品质量管理制度，包括采购、进货验收、仓储保管、出库复核、质量跟踪制度和不良事件的报告制度等 D. 应当具备与其经营的医疗器械产品相适应的技术培训和售后服务的能力，或者约定由第三方提供技术支持
[单项选择] A language is a signaling system which operates with symbolic vocal sounds, and which is used by a group of people for the purpose of communication.
Let’’s look at this 【B1】 in mom detail because it is language, more than anything else, 【B2】 distinguishes man from the rest of the 【B3】 world.
Other animals, it is true, communicate with one another by 【B4】 of cries: for example, many birds utter 【B5】 calls at the approach of danger; monkeys utter 【B6】 cries, such as expressions of anger, fear and pleasure. 【B7】 these various means of communication differ in important ways 【B8】 human language. For instance, animals’’ cries do not 【B9】 thoughts and feelings dearly. This means basically that they lack structure. They lack the kind of structure that 【B10】 us to divide a human utterance into 【B11】 We can change an utterance 【B12】 one word in it with 【B13】 a good illustration of this is a soldier who can say, e.g., "tanks approaching from the north", 【B14】 who can change one A. native B. human C. physical D. animal
