1985-1987年，我国计划生产的工业产品数从120种下调至60种，计划管理的商品从188种下调至23种，计划供应出口的商品数种70种下调至36种。这一调整表明（  ）

   Mr Smith 1from London. Now he is in China. He is 2 .He teaches 3 a middle school. He works very hard. His students like 4 very much. He can 5 a little Chinese . His students often teaches him Chinese 6 Sundays. Mr Smith likes playing football . He often plays football 7 his students.
   Mr Smith8  a son. His name is Jack. He is student. He studies in a middle school. He goes to school  9 bike everyday. He gets back home at four in the afternoon. He likes 10 TV in the evening.

科学探究的基本环节包括____、____ 、____ ____ 、____ 、____．