沙尘暴造成的大气污染物主要是 A．二氧化碳 B．二氧化硫 C．汽车尾气
—Is there ____ in your exercise book today? —No, Mom. I did it very carefully. A. something wrong B. wrong something C. anything wron
There are also many people who are interested inChinese ______(传统的) medicine, painting and calligraphy.
_______ get such a book? A. Where do you think can I B. Do you think where can I C. Do you think where I can D. Where do you think I can
若m÷2n=，则m与n的关系是( ) A．m=2n B．m=―2n C．m一2n=l D．m一2n=―1
依次填入下列各句加横线处的词语，恰当的一组是 （ ） ①一个大的事物，在其发展过程中， 着许多矛盾。 ②显然地，这“大家”也
2010年9月20日是全国第八个“公民道德宣传日”，为进一步宣传公民基本道德规范，广泛动员社会各界积极关心、支持、参与公民道德建设，培育文明向
Your house may have an effect on your figure. Experts say the way you design your home could play a role in whether you pack on the pounds or keep them off. You can make your environment work for y
轴上的椭圆
的离心率为
，则m= （ ）
B. 
C. 
D. 
