下列属于决定人口增长状况最主要的因素是
A．自然条件
B．社会制度
C．经济发展
D．道德水平
答案：C
根据所学可知，经济因素对人口自然增长的作用主要表现在它决定了人口的增殖条件和生存条件，通过改变人口的出生率和死亡率来影响人口的自然增率。一般情况下，当人口数量不能满足经济发展对劳动力的需求时，人口自身的再生产必将会刺激；当人口数量超越了经济发展所能提供的消费总数后，人口自身的再生产必将受到遏制。因此选C。
阅读下面短文，掌握其大意，然后从方框中选出能填入文中空白处的最合适的单词，并将该单词的标号 (A、B、C、D、E…) 填写在答题卡对应题号的横线上。
The American inventor Thomas Edison is believed to be the 小题2: person to use "Hello" on the telephone soon 小题3: the world's first telephone was 小题4: . At first people 小题5: their words on the telephone with "Are you there?" They were not sure if a telephone could really 小题6: voices. Edison was a man of 小题7: words. He wanted to save time. The first time he picked up the phone, he was very busy. He trusted the telephone 小题8: he invented it himself. He was sure someone was there and 小题9: said "Hello". From then on, "Hello" is often 小题10: when you pick up the telephone. |