题目

单项式 的系数是（ ） A . B . π C . 4 D . 答案：D用适当的介词填空。1. Every sportsman is training hard ________ the Beijing Olympics. 2. There are many different theme parks ________ the world.3. Liu Xiang is a symbol ________ China's international sporting success.4. If you are a famous sportsman, you'll be asked to appear ________ advertisements, films and so on.5. ________ other sports stars, Wang Hao started training when he was very young. 6. Du Li won the first gold medal ________ China at the Athens Olympics.7. Zhang Yining doesn't want to spend too much time away ________ sport. 8. Wang Bilin noticed Zhang Yining's skill ________ playing table tennis.