在适宜萌发的环境中，一粒种子能够长成一株完整的植物体，主要是由于（    ）

下列关于热值的说法中正确的是（　　）

阅读理解
    Most of the people in China can have four seasons. However, people in South China have three seasons --- spring, summer and fall. They don't have winters. In north China, people have a cold, dry and windy winter. But people in Kunming only have one season --- spring. It's warm and rainy all the year. You can see green trees and beautiful flowers there. So “ Spring City ”is another name for Kunming.

从左到右按顺序填数．

中国科学院9月9日发布《中国科学发展报告2011》。报告指出，长期以来的惯性，有些人陷入“GDP考核”、“唯GDP即政绩”、“唯GDP论高下”的怪圈，由此引发和累积的矛盾越来越多。为了追求较快的GDP增速，牺牲环境、浪费土地、影响民生。材料说明