A:火将植株质还原为可溶性的灰烬,并释放出钙、磷、钾等元素,加快物质循环
B:火的发生使枯枝落叶中的能量得以快速释放,提高了营养级之间的能量传递效率
C:该地区的松树与硬木阔叶树为竞争关系
D:火的发生影响了该地区群落演替的方向
根据短文内容和所给的汉语提示,写出短文空白处各单词的正确形式,每空限填一词。Miss White is from France. She can speak two____ (语言). She is a ____ (护士). She works in a ____ (医院)at night. She works very____ (努力). She likes to take a walk in a ____ (安静的) place. She likes ____ (动物) . She often goes to the zoo. Her cousin Bob is a reporter. He’s ____ (拍照)photos at the park . It’s____ (寒冷的) today. Look! Some people are swimming at the____ (泳池). Mr White is____ (感到惊讶的)to see it.
1819年,玻利瓦尔在委内瑞拉国会上说:“我们的政体应该成为一种建立在民权基础上,使立法权和行政权分立的共和政体,尊重公民自由,废除奴隶制度,取消等级特权。”材料展现了玻利瓦尔的主要思想有( )
①分权思想 ②君主立宪思想 ③民主共和思想 ④自由平等思想
函数f(x)=lgx+1-2x的定义域为( )