A. 矿物质 B. 脂肪 C. 碳 D. 水
A. 风门 B. 风桥 C. 风墙 D. 风窗 E. 测风站
A. 技术型人才 B. 管理型人才 C. 复合型人才 D. 专业型人才
A. be shielded from direct sunlight B. be locked into a constant heading C. have any air bubbles replaced with nitrogen D. have the compensating magnets removed