A:甲、乙、丙三个种群的数量增长方式均为“S”型增长
B:若某条件引起种群乙变为曲线丙所示情况,则导致这一变化的 原因最可能的是该种群迁入了大量同种个体
C:一般情况,气候是影响曲线中ab段波动的最强烈的外源性因素
D:曲线甲可用于表示封闭环境中酵母菌种群数量的动态变化规律
富兰克林•罗斯福是美国历史上第一位利用“炉边谈话”向人民阐释其施政方针的总统。在“新政”期间,罗斯福“炉边谈话”的内容最有可能的是( )
如图,AB∥CD,∠CDE=119°,GF交∠DEB的平分线EF于点F,∠AGF=130°,则∠F=____ .
爸爸精通四国语言,是一位出色的经济学硕士,本来他应该对人类做出更大的贡献,却被战争夺去了宝贵的生命。他的死是光荣的,他是为和平而倒下的,他倒在了维护世界和平的圣坛上。今天,我要向爸爸献上一束最美的鲜花,因为他是保卫世界和平的光荣战士。
Our school is on Guangming Street. It's next to the People's Library. There is a park across from our school. The pay phone is between our school and a post office. Our school is very beautiful. There are many trees and flowers in it. If you want to come to our school from the airport, take a taxi and go down Center Avenue. You can see a big restaurant on your right. There is a bridge near the restaurant. Go across it and turn left. Then go down Bridge Street. Turn left at New Park and go down Guangming Street. Our school is across from a bank.