拥挤的闹市，噪杂的人群。城市的居民足够的渴求清静的环境、新鲜的空气，我们应采取的最好措施是
下图甲表示A、B两种植物光合效率随光照强度改变的变化曲线，图乙表示将A植物放在不同CO2浓度环境条件下，A植物光合效率受光照强度影响的变化曲线
(浙江省宁海县知恩中学2009届高三最后适应性考试D篇) We spent a day in the country, picking wild flowers. With the car full of flowers we were going home. On our way back my wife
目前，全世界都在积极防治甲型H1N1流感。甲型H1N1流感病毒是一种RNA病毒，我国已研发出甲型H1N1流感疫苗并对有关人员进行了免疫接种，使许多人获得
Though we _________serious natural disasters, we are sure to overcome all difficulties. A. give away B. affect with C. suffer from
He will be _________(嫉妒的) if others get good marks in the contest.
a=(-2,5)的起点坐标为(1，2)，则它的终点坐标为( )A.(1，7) B.(-1，7) C.(7，1) D.(-1，-7)
