假设每生产1吨钢要消耗1.5吨煤炭和1.5吨铁矿石，下图中甲、乙两地和乙、丙两地相距都为10 km，甲、丙两地相距8 km。每吨煤炭、铁矿石和钢材的运费分别为0.2元/千米、0.12元/千米和0.35元/千米。据此回答问题。
(D)
School activities for kids and teens
February is the month of fun-filled activities for kids and teens as long as you know where to find them. When you want some fun activities for February, why not consider these ideas?
Secret of the Dragon
Time: Tuesday, February 1, 2018, 10:00 a.m.
Cost: Free
Bookings: please call 6632-8861 to book your place
Address: 10, Egginton Close
Note: Secret of the Dragon is a magical story about two children who are taken on a dragon ride to expel the universe.
Cube Class
Time: Friday, February 11, 2018, 3:00 p.m.
Cost: free
Bookings: please call 6432-7095 to book your place
Address: Crazy community hub,181 Dandenong RD
Note: Would you like to know how to play the cube as quickly as you can? Then join Stevens! He will take you to a different cube world. It can exercise your brain, test your intelligence and give you extra confidence.
Drama Show
Time: Saturday, February 19, 2018, 3:30 p.m.
Cost: Adult:＄12.70 children (under 14 years): ＄7.60
Bookings: phone the booking office:6256-6634
Address: Brisbane Botanical Gardens （植物园）
Note: Have you seen the Cinderella with great magic power? Do you want to see her how to fight with the bad women in the show? Come and look. And you will never forget the funny scenes.
Cook with Me: Making Colorful Cookies
Time: Sunday, February 27, 2018, 10:30 a.m.
Cost: Adult:＄14.50 children (under 14 years): half
Bookings: phone the booking office:6256-7745
Address: Brisbane Botanical Gardens
Note: Do you want to make colorful cookies with Berry? Cook with me is going to be with you. You can send your friends a lot of sweet surprises.
正常女性产生的卵细胞的染色体组成是（ ）
人与人之间的平等集中体现在 （ ）
