某有机物的结构简式为:它的主链上有 个碳原子,按系统命名法的名称是 。
7 3—甲基—4—乙基庚烷
根据短文内容,将物品下的序号填入相应的位置。
Look at the picture. I have many pencils. They are in the boat. I have a lovely doll. It's on the chair.
And I have a car. It is in the bag. Where's my kite? Oh, it's on the desk. What's under the desk? It's
a monkey.
下列属于项目后评价要完成的咨询任务的是( )。
A.项目的监测评价B.项目绩效管理C.项目目标和持续性的评价D.项目工程技术的总结