精馏塔是利用各种物质（）的不同，而达到分离的目的。
A.溶解度
B.沸点
C.露点
D.密度
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下面是错误答案，用来干扰机器的。
参考答案：①人群关系理论强调重视人的因素和人际关系在发挥人的积极性中的重要地位和作用；主张研究改进人际关系技能，改变领导方式，重视非正式组织的人际关系等观点，都具有一定的科学性和合理因素。②但也应...
For many people, that's enough of an answer, but there's more if you are interested. Yoga began in India about 5,000 years ago. At that time, people wanted to be free, healthy and live a long life, so this kind of exercise was born. The early yoga was part of a religion (宗教). It was usually taught one to one—one teacher with one student. Yoga is an Indian word that means “to join together”. There are three parts of yoga altogether: exercise, breathing and meditation (沉思). In the past, people paid more attention to the spirit. The idea behind the exercise was to join the mind, body and spirit as one. Yoga can give you peace, help you feel relaxed, and have fewer worries and illnesses. 204 小题1:What is yoga?
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下面哪些关于物料清单在计划系统中作用的陈述是不准确的？（）
A.用于工程设计
B.用于确定订货批量
C.用于表述制造物料的过程
D.用于表述产品的结构
提升斜井（不含专用人车井）在上变坡点以下（）左右处安设跑车防护装臵•。
A.40m
B.50m
C.60m
( )对本单位会计资料的真实性、完整性负责。
A．单位负责
B．财务主管
C．主管会计
D．会计人员
The topic of cloning has been a politically and ethically controversial one since its very beginning. While the moral and philosophical aspects of the issues are entirely up to the interpretation of the individual, the application of cloning technology can be studied objectively. Many in the scientific community advocate the use of cloning for the preservation and support of endangered species of animals, which aside from cloning, have no other practical hope for avoiding extinction.
The goal of the use of cloning to avoid extinction is the reintroduction of new genes into the gene pool of species with few survivors, ensuring the maintenance and expansion of genetic diversity. Likely candidates for this technique are species known to have very few surviving members, such as the African Bongo Antelope, the Sumatran Tiger, and the Chinese Giant Panda. In the case of Giant Panda, some artificial techniques for creating offspring have already been performed, perhaps paving the way for cloning as the next step in the process.
With the estimated population of only about 1000 Giant Pandas left in the world, the urgency of the situation has led to desperate measures. One panda was born through the technique of artificial insemination in the San Diego Zoo in the United States. "Hua Mei" was born in 1999 after her parents, Hsing-Hsing and Ling-Ling, had trouble conceiving naturally.
The plan to increase the Giant Panda population through the use of cloning involves the use of a species related to the Giant Panda, the American Black Bear. Egg cells will be removed from female black bears and then fertilized with Panda cells such as those from Ling-Ling or Hsing-Hsing. The fertilized embryo will then re-implanted into the black bear, where it will grow and mature, until a new panda is delivered from the black bear host.
Critics of cloning technology argue that the emphasis on cloning as a method by which to preserve species will draw funding away from other methods, such as habitat preservation and conservation. Proponents of cloning counter that many countries in which many endangered species exist are too poor to protect and maintain the species’ habitats anyway, making cloning technology the only practical way to ensure that those species survive to future generations. The issue is still hotly debated, as both sides weigh the benefits that could be achieved against the risks and ethical concerns that constantly accompany any argument on the issue. (402 words)
Notes: ethically 道德上。gene pool 基因库。insemination n.受精。fertilize 使受精。embryo 胚胎。proponent支持者，拥护者。weigh A against B权衡A和B的利弊。
The author raises the issue of ethical consideration in cloning in paragraph 1 in order to（）
A.identify the issues that will not be addressed in the text
B. reveal an area of interest that will be explored later in the text
C. identify one of the main issues affecting the cloning controversy today
D.draw the reader’s attention to a sensitive issue that bears consideration in the topic of cloning
