A. as soon as they saw him B. as soon as he had finished cleaning himself C. as soon as he settled down D. some time after they first saw them 参考答案:D 答案解析:[解析]该鸟首先cleaned himself 然后才开始dance。
第31题: [单项选择]知识产权制度的本质是通过法律手段把智力成果当作财产来保护,因而,知识产权制度()。 A. 限制了企业技术创新成果的公开 B. 限制了企业技术创新成果的转移与交流 C. 加速了企业技术创新过程 D. 延长了知识产权的保护时间 参考答案:C 答案解析:知识产权保护制度是随着技术创新的发生而产生,又随着技术创新的发展而不断地发展和完善。知识产权保护制度激励企业技术创新。随着市场经济的发展,技术创新成本加大,风险不断增加。如果企业被授予相应的知识产权后