A:3
B:6
C:8
D:10
Swimmers WantedCan you swim? Do you like kids? Can you help them with swimming on weekends? Come and join us. Call Jane at 330-8976 for more information(信息).Chess ClubDo you like to play chess? Mr Chen can teach you. You can come here every Friday afternoon.Tel: 623-1940Add: Room 102 in School’s P.E. BuildingLet's Learn FrenchCan you speak French? Do you want to learn French? Join the French club now.Time: 9:00 am—11:30 am(from Monday to Friday)Call Henry at 543-1248.Musicians WantedBoys and girls, are you music lovers? Can you sing or dance? Can you play any instruments(乐器)? Welcome to our Star Rock Band.Please call Victor at 891-3453 or send an email to music@yahoo.com.根据以上内容,选择最佳答案。
同一等高线上____ 相同,等高线越密集,坡越____ ;越稀疏,坡越____ 。