题目内容
长期以来，由于食品安全的概念不清、观念不强，我们将食品卫生、食品质量与食品安全混为一谈。实际上，食品卫生、食品质量与食品安全有着根本的______。食品安全意味着结果安全和过程安全的______，而食品卫生则仅关注过程安全。食品安全指的是食品的安全并避免伤害的担保，而食品质量指的是食品满足人们某种需要的属性。 填入划横线部分最恰当的一项是( )。
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Trees are useful to man in three important ways: they provide wood and other products; they give him shade; and they help to prevent droughts and floods. Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soi — allowing the rain to sink in — and also bind the soil, thus preventing it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing remains but worthless desert.
太阳系以外的行星距离我们50～1000光年，相对于所环绕的发光天体的光辉，它们显得黯淡无光，人们又无法到达那里，于是只能通过间接途径对其进行研究。1981年，科学家们观测以前很少光顾的绘架星座。距地球52光年的这个星座突然发生了不同寻常的情况：一颗形成时间不长的恒星的亮度曲线下降，在以后的几天中，亮度值又升至正常。天文学家推测可能有一颗环绕在被称为p星的恒星周围运行的行星遮住了望远镜，造成p星亮度降低。 根据这段文字，下列说法错误的是( )。
使用电子计算机进行会计核算的，其软件及生成的会计凭证、会计账簿、财务会计报告和其他会计资料必须符合国家统一的会计制度。( )
简述四步触诊法的步骤。
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