21．补写出下列名篇名句中的空缺部分。 （1）王维《汉江临眺》诗中描写水势浩瀚，波澜动荡的诗句是 ，
Cars produce a lot of waste gas every day and pollute the air , air pollution has become a serious problem． A．As a result B．In the way C．No l
I don’t know when he . When he , I will let you know. A. Will arrive; will arrive B. arrives ；arrives C. will arrive ；arrives D. arrives ；will
27. People have become aware ______the fact that carbon dioxide, poison to the environment, contributes_____ air pollution. A. of, to B. /, to C. of, of
My name is David Green. I am an English boy. My family are in Beijing. My father and mother work there. My father is an engineer( 工程师 ) and my mother is a teacher. I have a sister but no brother
各项均为正数的数列{an}前n项和为Sn，且4Sn＝a＋2an＋1，n∈N*. (1)求数列{an}的通项公式； (2)已知公比为q(q∈N*)的等比数列{bn}满足b1＝a1，且存在m∈N*满足bm
下列加点字的注音和划线字的字形完全正确的一项是 A.殷红（yīn） 愧怍（zuò） 颠沛 重銮叠嶂 B.藩篱（fān）
中共十八大会议上，胡主席同志强调，完善基层民主制度，健全基层党组织领导的充满活力的基层群众自治机制，以扩大有序参与、推进信息公开、加
关于直线x=2对称的曲线方程是……（ ）
