We are pleased with the fact that the people in the poor area are proud of what they ______ in the past 10 years. A. are achieving B. achieved C. have achieved
Nick is a 14-year-old school boy. His life is full of exams and studies on weekdays. He has little free time. He thinks playing computer games is the best way to make him relax. When he has
实数a、b在数轴上的位置如图所示，则a与－b的大小关系是………………（ ） 