Internet是一个非常重要的网络，其使用的最基本、最重要的协议是______。A 发布时间：2017-06-07 08:25 │ 来源：www.tikuol.com 题型：单项选择题 问题： Internet是一个非常重要的网络，其使用的最基本、最重要的协议是______。A．IPX/SPX协议B．NCP协议C．TCP/IP协议D．NETBIOS协议
题型：单项选择题 下列关于白血病的描述哪项不确切（）.A.急性粒细胞白血病可出现白血病细胞"裂孔"现象B.急性白血病，骨髓增生极度活跃，原始和早期幼稚细胞显著增多C.急性白血病外周血白细胞计数比正常人增高D.急性白血病骨髓可见红细胞系和巨核细胞系减少E.急性白血病一般自然病程短于六个月 查看答案
题型：单项选择题 书面表达教育部倡导学生:每天锻炼一小时；健康工作五十年；幸福生活一辈子请你根据以上提示,用英语准备一份发言稿,向同学们讲述一下阳光体育活动的有关情况,并就高中学生是否需要每天花一小时锻炼,谈谈你的看法及理由.注意:1．发言稿应包括以上所有信息,要有适当发挥.2．词数:120左右.3．参考词汇:阳光体育活动a national student sports program；教育部the Ministry of Education______________________________________________________________________________________________________________________________________________________ 查看答案
题型：单项选择题 Lichens may grow on the bark of a tree in a steaming tropical rain forest, on the bricks of big city buildings, on rocks in hot springs, on wind-swept mountaintops, and in the driest desserts. In the arctic, they provide the principal food for caribou, and they are one of the few plants that grow in Antarctica. They are pioneers, appearing in barren rocky areas and starting the formation of soil in which mosses, then ferns, and then other plants can take root. Lichens are a partnership of two plants — fungi and algae. The lichen body is made up of a network of fungal strands. In the upper layers of these grow groups of algae. The two organisms live together to the benefit of both, a relationship known as symbiosis. The fungi provide support, absorb water, and shelter the tender algae from direct sunlight. The algae carry on photosynthesis and provide the fungi with food. The algae can live independently and are recognizable as a species that grows alone. The fungi, on the other hand, cannot live apart from their partners. They can be placed in known classes of fungi but are unlike any species that lives independently. So definite are the form, color, and characteristics of these double organisms that for hundreds of years, they were classified as one. More than 15,000 "species" were named. If these organisms are classified as separate species, it is difficult to fit them into the existing system of classification. But if they are classified separately, these species of fungi seem rather strange. Lichens are a splendid example of the difficulties faced by taxonomists in classifying species.The word "splendid" underlined in Paragraph 3 most probably means ______ .A．uniqueB．improbableC．excellentD．famous 查看答案