题干

有一真空瓶的质量为W1 g,向该瓶充入氧气后的质量为W2 g,在相同条件下充入某一单质气体,其质量为W3 g,则此单质气体的摩尔质量为                  (  )

A:×32

B:×32

C:×32 g/mol

D:×32 g/mol

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C

同类题3

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    Developing healthy eating habits starts from childhood, therefore it is important for parents to teach and provide children with a healthy diet. DPHSS administrator of the Bureau of Nutrition Services, Charlie Morris told KUAM News, “A healthy diet for a child consists of a lot of fruits and vegetables in the diet limiting the amount of simple sugars in the diet and high fat food and highly processed food.”

    This means staying away as much as possible from food such as chips, cookies, candies and sugary drinks, as all children need to have meals which involve a well-balanced diet. Community nutritionist Thelma Romoso said, “The fruit, the vegetable, the grain, the protein, and also the milk, the diary product, so for the fruits it's easy for a mother to go into the two plus three concept of fruits and vegetables or five a day.”

    This concept means that there are at least two servings of fruits a day, three servings of vegetables a day which can be served for lunch and dinner. As for protein parents can make a variety of dishes from chicken, beef, fish or even dried beans to pledge the child gets three servings a day.

    Morris said that the child's hunger level controls how much is eaten and the parent controls what and when the meal is offered, saying, “Mom needs to ensure that the food offered is good food for the child to eat and throughout the day depending on how active they are, snacks are not a bad thing, so the mom should offer good kinds of snacks.”

    When it comes to preparing your child's lunch and snacks for school, make sure to keep in mind that the food you provide should not only be a source of energy but also be nutritionally beneficial such as fresh fruits, and whole grain bread. But parents must be sure to remember that a good nutritional diet must be balanced with physical activity, namely it is important that children get outside and run around and play and get activity in addition to eating a good diet.

同类题5

阅读下面的文字,完成后面小题。

    生态美学的研究对象应该是生态学和美学各自研究对象的交叉部分,即人与自然的和谐关系。生态学研究生物与其环境的关系,美学研究人与现实(自然、社会、艺术)的审美关系。生态学和美学的结合点在于人与自然关系的和谐。生态学研究物种之间的共生关系,也包括人与其环境、与其他物种关系的和谐。人与自然和谐也是美学的研究对象,生态美学不仅研究人和自然的和谐关系,而且研究人和自身的和谐关系。

    从学科性质上,生态美学的最终落脚点在美学,而美学的最终依据在哲学,也就是说,我们必须为生态美学找到其哲学依据。中国《周易》及道家思想、古希腊前苏格拉底哲学、印度《奥义书》等人类早期的哲学、宗教典籍里蕴涵了万物生成的思想。老子认为人和万物拥有同一个来源,那就是“道”,庄子也主张物我合一的自然哲学。人与万物同构、同源、同具有道性或神性,这是生态美学得以成立的哲学基础。首先,人与万物交换能量。人需要阳光、水、空气、食物,如果这些被污染被破坏,必然殃及人类自身。人的生命得以延续,时刻离不开自然界,所以人类应该节约能源,减少污染。其次,人与万物交换信息。人情感反映都是在与万物共在中发生、发展的,而不仅是人类改造自然的结果。再次,人与万物的关系不可能是主体与客体的关系,而在于我与你的关系,是互为主体的关系。万物的欣欣向荣必然使人感觉愉快,万物的肃杀衰败必然使人心生哀戚。从人和万物的生成角度,我们不仅能够找到生态美学的学科依据,也能够找到生态伦理学的学科依据。

    西方现代美学所探讨的人与万物之间的审美关系与现代生态学关于人和万物相互依赖关系的观点具有一致性。首先,认识论美学把人和审美对象的关系理解为主体和客体的关系,现代美学认为,在审美体验中对象有了知觉和情感,与人心灵得以沟通,因此审美主体和审美对象之间不是主体和客体的关系,而是主体间性的关系。其次,传统美学把感性认识和理性认识、抽象思维与逻辑思维对立起来,认为只有后者涉及真理,而现代美学认为它们原本就是共生的、同根同源的,思维包含了感性,艺术揭示着真理。

    从研究方法上,生态美学可能引入自然科学方法,但是更根本的是人文科学的方法,如现代解释学的体验、表达、理解等。数学可以给我们提供准确的数字,比如某些物种的数量及分布,使我们对于生态状况有直观的了解,但是数学不能解决生态美学的问题。庄子体会到鱼在水中畅游的快乐,现代人体会到藏羚羊趋于灭绝的痛苦,只能进行体验和解释,不能以科学实验来证明。