钢铁是使用最多的金属材料．
（1）生铁和钢都是铁的合金，其中含碳量较高的是______．
（2）人们大量使用的是铁合金而不是纯铁，这是因为铁的合金具有更多优良性能，例如钢比纯铁硬度______．（填“大”或“小”）
（1）生铁的含碳量是2%-4.3%，钢的含碳量是0.03%-2%，
故答案：生铁；
（2）铁制品含碳量越大硬度越大，钢的含碳量比纯铁高，钢的硬度大，
故答案：大．
| 信息匹配 | ||||||
| The people below all want to go on a short trip and there are descriptions of six trips which a ferry company is offering. | ||||||
| 1. Ray and three of his friends would like to spend a whole weekend driving around in nice scenery and enjoying some local food. | ||||||
| 2. Phil and Adam want to go on a comfortable trip which takes them quickly to an interesting city. Then they want to enjoy at least two days of sightseeing. | ||||||
| 3. Mike, Kathy and their three children don't have much money, but they want a special day out this Saturday. They must be back home by 9 p.m. | ||||||
| 4. Kirsten is a Dutch student who is studying in Scotland. She doesn't drive, but wants a day trip to see some beautiful scenery and spend a little time by the sea. | ||||||
| 5. Clare and Robert want to enjoy some good food, but would also like to give their two young children a day to remember. They don't mind if they spend a lot of money | ||||||
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