问题 选择题

关于元素和化合物的叙述中,正确的是[ ]

A.组成生物体的元素都是大量元素

B.不同的生物体内元素种类大体相同

C.不同生物体内各种化合物含量基本相同

D.不同生物体内各种元素含量基本相同

答案

答案:B

综合

(12分)下图是我国某区域图,据此回答下列问题:

(1)试描述图中东部-20℃等温线的分布特点,并分析其原因。(3分)

                                                                           

                                                                           

                                                                           

(2)简述图中A河流的水文特征。(2分)

                                                                           

                                                                           

                                                                           

                                                                           

(3)图示地区的主要农业地域类型是         ,其种植的农作物主要是                   。(3分)

(4)该地区农业发展最主要的限制因素是                          。(1分)

(5)简述B城所在省区发展能源工业的优势条件。(3分)

                                                                           

                                                                           

                                                                           

判断题