sin30°的值等于( )
A:12
B:33
C:32
D:3
短文改错。
Alice is a good friend of me____ .She was born in a small town near London on the November 3rd 1980____.Her father was a worker and her mother was a teacher in England. When we were in Grade First____ , her family moved to Shanghai. Her father find ____ work there. Now her father works in a big factory. Her mother is still ____ teacher in China. She doesn't lives____ in Shanghai. Everything in Shanghai is very dear.Her home lives____ very far from the school.So they have to get up very early in the morning every day and go to school by bus.Because she is new here,she has a few friends____ here.“Life is not so happy here,”she often tells____ to me. I think I should help Alice.
走在大街上每隔几十米就会看到公共垃圾箱(见图),请据图回答:
(1)从垃圾箱上的标志可以判断甲中应装入的是不可回收垃圾,乙中装入的是____垃圾.
(2)随着社会的发展,人们对垃圾分类处理的意识越来越强,请将以下生活垃圾进行分类:废报纸、易拉罐、剩饭菜、苹果皮装入甲中的是____,装入乙中的是____.
(3)用过的废旧电池不可以随意乱扔,因为它属于____垃圾,会对环境造成污染.
(4)我国采用的垃圾处理方法主要是____、填埋和堆肥等方法.
在现行宪法公布30周年纪念大会上,***发表讲话。宪法成为历史新时期党和国家的中心工作、基本原则、重大方针、重要政策在国家法制上的最高体现,是因为宪法()①规定了国家性质和根本任务 ②确立了中国特色社会主义道路的发展成果 ③是国家的根本大法和依法治国的核心④反映了我国各族人民的共同意志和根本利益
若sinθ+sin2θ=1,则cos2θ+cos6θ+cos8θ的值等于( )