中国历史上的主要科学领域和技术部门是直接为国家的治理服务的，注重的是科学技术的功用，而不是注重探索其原理和原因，因而形成了“但言其当然，而不言其所以然”的学术倾向。这表明中国古代科技（    ）

    Li Ming wants to buy some gifts for his mother and cousin in China. He goes to a shop. He buys two dresses for his cousin and some dishes for his mother. Now he needs some boxes. Jenny gives the boxes to Li Ming. Li Ming says thanks to Jenny and writes letters to his mother and cousin. Then Li Ming goes to the post office and buys four stamps. He thinks that his mother and cousin will like the gifts. He walks back to his house. He feels happy.

2002年，我国出现了“非典”，它的病原体是____，当时我们采取的预防措施是____。