2016年9月4日在杭州举行的G20峰会上，***提到了“中国经济增长是世界经济增长的重要动力”，“中国是二十国集团全面增长战略的最大贡献者之一”。这意味着（ ）
A：我国已成为发达国家，引领时代发展潮流
B：国际竞争的实质是以经济增长为基础的综合国力较量
C：中国在世界经济舞台上有着举足轻重的地位
D：中国正式进入互利共赢的开放战略时期
Come and 1 my 2. This is my father. 3 is a tall man. This is my 4. She is5 art teacher. 6 boys are my two brothers. I'm a girl. I’m my 7daughter. And there is a cat in 8 family. Its name 9 Lily. We all like10.
My name is Tom. I'm nine. This is my mother(母亲). Her name's Linda Johnson. Her telephone number is 13052864515. And this is my father(父亲). His name is Mike Johnson. His phone number is 13120884699. And this is my sister(姐妹). What's her name? Her name is Mary. Look! The boy is my brother(兄弟) Nick. Mary is eight and Nick is six.
等差数列{an}中，若a4+a6+a8+a10+a12=120,则a9-13a11的值是（ ）
