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| 应填事项 | |||
| 必需元件 | |||
| 关键元件; 要素 | |||
| 票据要项 | |||
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| 必需矿物质为动、植物生长和发育所必需的矿物元素 | |||
| 生命必需元素 | |||
| 主要元素 | |||
| 营养元素 | |||
| 基本要素 | |||
| 必要元素 | |||
| 必需元素 | |||
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essential elements : 15 phrases in 9 subjects |
| Agriculture | 2 |
| Air defense | 1 |
| Aviation | 2 |
| Business | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Space | 2 |
| Sports | 1 |
| Technology | 4 |
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