2008年10月始，国家相继采取了调高部分商品出口退税率、下调90平方米以下普通住房契税、暂免个人投资者取得的证券交易结算资金利息个人所得税等
About 1966 or so, a NASA(美国航空航天局) team doing work for the Apollo moon mission took the astronauts near Tuba City. There the landscape of the Navajo Reservation looks very much like the l
居室空气污染的主要来源之一是人们使用的装饰材料、胶合板、内墙涂料会释放出一种刺激性气味气体。该气体是 A、甲烷 B、甲醛
You want to know where the safest place for young children is in the car? For a child of any age, the back seat is the safest place and the safest part of the back seat is the middle. In the back seat
有四名同学各举一例，说明生物能够影响环境，其中正确的是（ ） A．乌贼遇到敌害时会喷出墨汁 B．在沙地上栽种植物可以防风固沙 C．仙人掌的叶
---- Guess what! I have passed my driving test last week. ---- ______! A. Congratulations B. Celebrations C. Good luck D. All right
若直线x-2y=0与双曲线的两个交点在x轴上的射影恰好是该双曲线的两个焦点，则此双曲线的离心率等于( )A. B. C.
