根据短文内容，完成下列任务。

Each child loves to celebrate their birthday. ①It is a special day for them because they can get almost(几乎) everything they want on that day. Children usually celebrate their birthdays with a party. The party may not be on the exact(准确的) date of birthday if it comes on a school day. It may be on the closest(最近的) weekend.

Some children have birthday parties at home.Parents make the house beautiful with balloons and coloured paper. And home-made food is a wonderful treat for the children. The children play different games and have lots of fun at the party.

Others may have their parties at their favourite restaurants. They eat pizza and ice cream. The waiters serve(端上) the food and also sing and play games with them.

②Every      party has a birthday       with candles on top. There is one candle for each year of a birthday boy's or girl's age. When the candles are lighted, everyone sings the special birthday song: HAPPY BIRTHDAY TO YOU!

____ ，是北方地区中北部的三个省。那里蕴藏着丰富的____ 、____  、____ 和____ 等资源，其中以广袤的____ 资源最为珍贵。

金刚石、石墨和C₆₀都是由碳元素组成的单质，下列说法中正确的是

下图为某经济林在一定时间内某种毛虫和灰喜鹊种群数量的波动曲线，下列叙述正确的是（  ）