There have been several claims to have cloned humans over the past few years. Most have been bogus. But the announcement made this week by Woo Suk Hwang, of Seoul National University in South Korea, and his colleagues, is serious. It is the first to achieve the accolade of publication in a peer-reviewed scientific journal. Dr. Hwang s work appears in Science.
The terminology of human development has become slippery over the past few years, in the hands of both "life-begins-at-conception" propagandists who want to stop this sort of research, and publicity-seeking scientists who have claimed more than they have really achieved. What Dr. Hwang and his team have created is not what developmental biologists would normally refer to as an embryo. But it is a genuine scientific advance. South Korea’s researchers have taken egg cells from volunteer women, removed the nuclei from those cells (which contain only half of the genetic complement required to make a human
A. criticism
B. satire
C. suspicion
D. appreciation
There have been several claims to have cloned humans over the past few years. Most have been bogus. But the announcement made this week by Woo Suk Hwang, of Seoul National University in South Korea, and his colleagues, is serious. It is the first to achieve the accolade of publication in a peer-reviewed scientific journal. Dr. Hwang s work appears in Science.
The terminology of human development has become slippery over the past few years, in the hands of both "life-begins-at-conception" propagandists who want to stop this sort of research, and publicity-seeking scientists who have claimed more than they have really achieved. What Dr. Hwang and his team have created is not what developmental biologists would normally refer to as an embryo. But it is a genuine scientific advance. South Korea’s researchers have taken egg cells from volunteer women, removed the nuclei from those cells (which contain only half of the genetic complement required to make a human
A. Different.
B. Fake.
C. Bold.
D. Genuine.
Painting has been continuously
practiced by humans for some 20,000 years. Together with other activities
{{U}} (31) {{/U}}ritualistic in origin but have come to be designated as
artistic (such as music or dance), painting was one of the earliest ways in
which man{{U}} (32) {{/U}}to express his own personality and his{{U}}
(33) {{/U}}understanding of an existence. {{U}} (34)
{{/U}}music and dance, however, examples of early forms of painting have
survived to the present day. The modern eye can derive aesthetic as well as
antiquarian satisfaction {{U}} (35) {{/U}}the 15,000-year-old cave murals
of Lascaux--some examples{{U}} (36) {{/U}}to the considerable
powers of draftsmanship of these early artists. And painting, like other arts,
exhibits universal qualities that{{U}} (37) {{/U}}for viewers of all
nations and civilizations. The major A. extinct B. extent C. extant D. exterior 我来回答: 提交
|