关于同步T触发器逻辑功能的表述正确的是（）。 A.有可能出现不确定状态 B.具有

历史发展往往是辨证地统一在一起．从民主的发展进程来看，在梭伦改革中即是雅典民主政治奠基的重要成果，又是雅典民主政治建设继续发展时最大障碍的措施是

A．颁布“解负令”，废除“六一汉”

B．确立财产等级制度

C．建立“五百人会议”

D．鼓励发展工商业

定点批发企业销售超过有效期的麻醉药品和精神药品（）

A．由药品监音管理部门取消其定点批发资格，并依照药品管理法的有关规定处罚

B．由药品监督管理部门责令改正，给予警告，没收违法交易的药品，并处罚款

C．由设区的市级人民政府卫生主管部门责令限期改正，给予警告

D．由县级以上人民政府卫生主管部门给予警告，暂停其执业活动

E．由药品监督管理部门责令限期改正，给予警告

（）是一个人智力发展的奠基时期。

A、0~1岁

B、0~3岁

C、0~5岁

D、0~6岁

胆碱能性荨麻疹典型皮损的特点为

A．风团直径大小不等
B．风团直径8～10mm，周围无红晕
C．风团直径8～10mm，周围有一较小红晕
D．风团直径2～3mm，周围无红晕
E．风团直径2～3mm，周围有一较大红晕

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。

Paragraph 4 is written in order to（）

A. detail the process by which cloning in the panda population has been executed in the past

B. guide the reader to consider the possibility of cloning in restoring the panda population

C. demonstrate that the use of cloning to repopulate the panda species is a feasible goal

D. inform the reader of how cloning would be carried out in the panda population