韶山3型电力机车车钩和枕梁的纵向中心对车体底架纵向中心线的偏差不大于（）
题型：填空题
问题：
韶山3型电力机车车钩和枕梁的纵向中心对车体底架纵向中心线的偏差不大于（）
题型：填空题
It was on a warm day last summer. I was walking by the sea. The waves came and went. But I didn’t see them. I was lost in my thoughts. A row of small holes soon caught my eyes. They lay in the sandy earth by the side of a road. In a minute I would have stepped on them. What are these holes? I wondered. It had an answer soon. A fat, hairy insect crawled up from the earth. It had a wide tail. It was using the tail to dig in the ground. The insect moved round and round in one spot(地点). Soon it had made another hole. When it was finished, the insect hid at the bottom. It covered its head with sand. By now my thoughts of the early morning had gone. This new hole and the insect were all my world. So I sat quite still by the side of the road. And I waited. As I watched, a small ant crossed the road. It passed my foot, a  nd then it crossed the sandy earth. In a little while it reached the edge of the hole. I saw it start to fall in. The ant tried to turn back. But it couldn’t.And then I knew. I knew why the holes were there. For just then the fat insect came up out of the hole. It ate the ant who was trapped there. Later I learned the insect’s name. It’s called ant lion. It digs holes to catch ants. I’ll never forget that day. The holes looked so small to me. But to the ant and the ant lion they were the whole world. I took my walks by the sea that summer. But I never aga  in learned as much as I did on the one.小题1: What did the ant lion use to dig holes?
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ep warm.