题目

如图甲，用螺旋测微器测量金属丝直径d＝______mm。 答案：2.150 mm 【解析】：(1)螺旋测微器的固定刻度为2 mm，可动刻度为15.0×0.01 mm＝0.150 mm，故金属丝直径为2 mm＋0.150 mm＝2.150 mm。1. Please throw away your empty bottles. (改为否定句)________ ________ away your empty bottles, please.2.Let’s go to the forest park and have a barbecue. (改为反意疑问句)Let’s go to the forest park and have a barbecue, ________ ________?3. The team members will come back from Beijing in three days. (对划线部分提问)________ ________will the team members come back from Beijing?4. Mr. Green came into the room. He held a cup of tea in his hand. (合并为一句)Mr. Green ________ the room ________ a cup of tea in his hand.5.Dolphins are so clever that they can follow the instructions. (保持原句意思)Dolphins are ________ ________ to follow the instructions.6. Our teachers always tell us to keep the environment clean. (改为被动语态）We ________ always ________ to keep the environment clean by our teachers.7.old, the, to, cleaning, had, all, woman, the, do, herself. (连词成句)________________________________________________.