关键字段不一定是用来标识数据表中每条记录的唯一性的字段。
态度是一种内部准备状态,而不是实际反应本身。
影响迁移的主要因素有学习任务的相似性、原有认知结构和学习的______。
Human demands on natural resources have doubled in less than 50 years and now outstripping what the Earth can provide by more than half, a new report has warned. If this situation continues, globally it will need the capacity of two Earths by 2030, the Living Planet Report said. And the report, from the World Wide Fund For Nature, the Zoological Society of London and the Global Footprint Network, said British people are still consuming far more than the Earth can offer. Wildlife in tropical countries is also under huge pressure, with populations of species falling by 60 percent in three decades. The study, which looked at 8, 000 populations of 2, 500 species and studied the change in land use and water consumption across the globe, warned that if everyone lived such a lifestyle as they like, humans would need 2. 75 planets to survive. The world's people are now living lifestyles which would require one and a half planets to support their lives, though there are significant differences between rich and poor nations. The UK comes 31 st in a list of countries based on their " ecological footprint" —the amount of land and sea each person needs to provide the food, clothes and other products they consume and to absorb the carbon dioxide they give off. The country has fallen down the league table from having the 15th biggest footprint in the last report two years ago, but the World Wide Fund For Nature points out this is due to an increase in other countries'influence not a reduction in the UK's use of resources. Ireland has the 10th highest ecological footprint in the world, while the United Arab Emirates, Qatar, Denmark, Belgium and the USA are the five worst countries for over-consumption of resources. It also carried a warning about the loss of wildlife and ecosystems which people depend on for food, fuel, clean water and other resources—with populations of species declining by 30 percent worldwide between 1970 and 2007.
幼儿园教育的生活性体现在幼儿园教育活动的______方面及幼儿园教育活动的途径与环境、场所方面。
教学评价是对______所做的测量、分析和评定。
针对少年儿童氧运输系统的特点,简述在体育教学中应当注意哪些问题。
德育过程是促进学生内部心理矛盾向积极方向转化的过程。
按照智力测验的标准,智力超常儿童的智商最低临界值应是______。
以下说法中,反映当代世界各国课程改革中所存在着的一些共同的发展趋势的是______。
高级语言相对于汇编语言和机器语言而言是目前应用最为广泛的语言。高级语言编写的程序能不能直接被计算机执行?为什么?
根据语境,下面的说法得体的一项是( )。
新型师生关系的特点不包括______。
下列各句中没有语病、表意明确的一项是( )。
变声期
英语课程标准要求培养学生达到综合语言运用能力,其中文化意识能力包含文化知识,文化理解和______意识与能力。
《义务教育音乐课程标准》的教学领域包含______、______、______、______四个领域。
戴老师很担心,同一批学生在第二次参加同样内容的人格测验时获得的分数为什么与上一次不同
我国什么戏曲被联合国教科文组织定为非物质文化遗产?______
“当时明月在,曾照彩云归”的作者是______。
