题目

If you desire to meet new friends, have fun and get into shape, basketball is the best sport for you regardless of whether you are a professional or an amateur.【1】Here are some of the benefits you can acquire from playing basketball.• Improve your fitness levels.Playing basketball will definitely improve your fitness levels. Basketball is an amazing cardiovascular(心血管的) exercise. 【2】 Moreover, it aids in oxygen circulation and blood distribution throughout the body.• Encourage teamwork. Basketball requires team work to achieve a common objective. 【3】 This sport is great下列是某化合物的结构简图，据图回答：（1）该图中表示氨基的是_________（填序号）,表示羧基的是_________（填序号）（2）该化合物的名称为_________，其基本单位的结构通式是________________________。（3）该化合物是由___________个氨基酸构成的，形成过程中分子量减少了____________。