我国法律规定，计算机软件著作权的权利自软件开发完成之日起产生，对公民著作权的保护期限是______ 。
A．作者有生之年加死后50年
B．作品完成后50年
C．没有限制
D．作者有生之年
参考答案：A
解析：
本题考查知识产权保护方面的基本知识。
根据《中华人民共和国著作权法》和《计算机软件保护条例》的规定，计算机软件著作权的权利自软件开发完成之日起产生，公民的软件著作权保护期为公民终生及其死亡之后50年；法人或其他组织的软件著作权保护期为50年。保护期满，除开发者身份权以外，其他权利终止。一旦计算机软件著作权超出保护期后，软件进入公有领域。计算机软件著作权人的单位终止和计算机软件著作权人的公民死亡均无合法继承人的，除开发者身份权以外，该软件的其他权利进入公有领域。软件进入公有领域后成为社会公共财富，公众可无偿使用。
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| We have always been warned of the dangers of forest fires. They cause 1 to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be 2 for a forest? People start some of the fires with a special reason to actually do good to the eco-system. In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can 3 some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place. Some trees even need fires to grow. These trees hold their seeds (种子) inside. Heat from a fire allows the coat of the seeds to open up. Then the seeds fall to the ground and have the 4 to grow/ Scientist, who know about nature's needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or 5 a after forest fires, they can go hungry 6 their food has been damaged in the fire. Small, controlled fires mean than animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This 7 makes an eco-system. So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever. | ||||
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