【简答题】二.填空题 8.已知M、N是△ABC的边BC、CA上的点,且 = , = ,设 = , = ,则 =
【简答题】读澳大利亚和巴西简图,回答下列各题. 小题1:关于两国自然环境的描述,正确的是( ) A.澳大利亚东部以低矮的高原为主 B.澳大利亚地跨热带和南温带 C.巴西全部位于南半球 D.巴西气候干燥,沙漠面积广大 小题2:关于澳大利亚和口和经济的叙述,不正确的是( ) A.两国的人口和城市集中分布在东南沿海地区 B.澳大利亚素有“骑在羊背上的国家”之称,巴西大量出口黄麻 C.两国都是世界上重要的...
【单选题】Species interdependence in nature confers many benefits on the species involved, but it can also become a point of weakness when one species involved in the relationship is affected by a catastrophe. ...
A.
Species interdependence is a point of weakness for some plants, but is generally beneficial to insects involved in pollination.
B.
Efforts to control the spruce budworm have had deleterious effects on the red-osier dogwood.
C.
The use of pesticides may be endangering certain plant species dependent on insects for pollination.
D.
The spraying of pesticides can reduce the fecundity of a plant species, but probably does not affect its overall population stability.
【单选题】下列有关亚洲人文环境的叙述,正确的是 ( )
D.
亚洲少数国家属于发达国家 , 大部分国家属于发展中国家
【单选题】目前成人、儿童、婴儿基础生命支持程序为 ( )
【简答题】东南亚、南亚自然地理环境优越,物产丰富,具有经济发展的良好条件。回答1—2题。 1、下列关于东南亚与南亚地理特征共同点的斜述正确的是 [ ] A、受热带季风影响,农业生产具有良好水热条件 B、大部分地区属高原地形,地势平坦,土壤肥沃 C、河流众多,水量丰富,均自北向南注入印度洋 D、利用丰富的石油资源,重点发展石油化工工业 2、下列关于东南亚与南亚地理特征不同点的叙述,正确的是 [ ...
【单选题】Many scientists in the West hold the view that it will be no longer a question soon___________ man can report the earthquakes, volcanic eruptions and tsunamis.