题目

阅读理解Oldage may not sound exciting. But recent findings offer good news for olderpeople and for people worried about getting older. Researchers found thatpeople become happier and experience less worry after they reach the age of 50.In fact, they say by the age of 85, people are happier with their life thanthey were when they were 18 years old.Thefindings came from a survey of more than 340,000 adults in the United States.The Gallup Organization questioned them by telephone in 2008. At that time, thepeople were between the ages of 18 and 85. The researchers asked questionsabout emotions8．衢州桔柑果实较小，常为扁圆形，皮色橙红、朱红或橙黄．果皮薄而宽松，海绵层薄，质韧，容易剥离，囊瓣7至11个．味甜或酸，种子呈尖细状，不耐贮藏．请分析以下内容：（1）桔柑可用种子繁殖，而果农一般采用嫁接或压条的方法来繁殖，嫁接或压条的方法在生殖类型上属于无性生殖．（填“无性生殖”或“有性生殖”）（2）一个桔柑果实中往往有很多种子，这是因为在发育过程中一个子房中含有多个胚珠．