1.  >>  成人高等教育 / 药用植物学
 成人高等教育 / 药用植物学
正确率:100%

托叶环痕是( )的特征。
  • A、
    毛茛科
  • B、
    木兰科
  • C、
    伞形科
  • D、
    蔷薇科
  积分
 参考答案:
 佳题速递:
  • 现代人力资本理论认为,个人的道德素质、信誉、和社会关系也应属于人力资源的内容。国际企业管理
  • 题型描述: 阅读理解Humanity uses a little less than half the water available worldwide. Yet occurrences of shortages and droughts (干旱) are causing famine and distress in some areas, and industrial and agricultural by-products are polluting water supplies. Since the world's population is expected to double in the next 50 years, many experts think we are on the edge of a widespread water crisis.But that doesn't have to be the outcome. Water shortages do not have to trouble the world---if we start valuing water more than we have in the past. Just as we began to appreciate petroleummore after the 1970s oil crises, today we must start looking at water from a fresh economic perspective. We can no longer afford to consider water a virtually free resource of which we can use as much as we like in any way we want.Instead, for all uses except the domestic demand of the poor, governments should price water to reflect its actual value. This means charging a fee for the water itself as well as for the supply costs.Governments should also protect this resource by providing water in more economically and environmentally sound ways. For example, often the cheapest way to provide irrigation(灌溉)water in the dry tropics is through small-scale projects, such as gathering rainfall in depressions(凹地) and pumping it to nearby cropland. No matter what steps governments take to provide water more efficiently, they must change their institutional and legal approaches to water use. Rather than spread control among hundreds or even thousands of local, regional, and national agencies that watch various aspects of water use, countries should set up central authorities to coordinate water policy.基础英语I
  • 与科学的膳食关系密切的是下列何项临床营养学
  • 下列属于人体内分泌腺的是 幼儿卫生与保健
  • 5[论述题] 在选择绩效考评方法时需要考虑哪些影响因素绩效管理
  • 成熟T细胞表达CD4分子和CD8分子错误正确医学微生物学与免疫学(基础医学)