[填空题]New towns and other non-agricultural uses occupy large amounts of degraded land.

[填空题]New towns and other non-agricultural uses occupy large amounts of degraded land.

[单项选择]

What if our society uses new-found technologies of "genetic engineering" to interfere with the biological nature of human beings Might that not be disastrous
What about cloning, for instance
Cloning is a term originally used in connection with nonsexual reproduction of plants and very simple animals. Now it is coming into use in connection with higher animals, since biologists are finding ways of starting with an individual cell of a grown animal and inducing it to multiply in the same way in the future.
But is cloning a safe thing to unleash on society Might it not be used for destructive purposes For instance, might not some ruling group decide to clone their submissive, downtrodden peasantry, and thus produce endless hordes of semi-robots who will slave to keep a few in luxury and who may even serve as endless ranks of soldiers designed to conquer the rest of the world
A dreadful thought, but an unnecessary fear. For one thing, there i
A. genetic engineers are experimenting with cloning
B. the cloning of human could produce a privileged class
C. worries about the dangers of human cloning are ill-founded
D. personality traits cannot be passed on through cloning

[填空题]A new study uses advanced brain-scanning technology to cast light onto a topic that (1) ______
psychologists have puzzled over more than half a century: social conformity. The study (2) ______
was based on a famous series of laboratory experiment from the 1950’s by a social psy (3) ______
chologist, Dr. Solomon Asch. In those early studies, the subjects were shown two cards.
On the first was a vertical line. On the second were three lines, one of them the same length
with that on the first card. Then the subjects were asked to say which two lines were (4) ______
like, something that most 5-year-olds could answer correctly. But Dr. Asch added a twist. (5) ______
Seven other people, in cahoots with the researchers, also examined the lines and gave
their answers before the subjects did. And sometimes these confederates unconsciously (6) ______
gave the wrong answer. Dr. Asch was astonished at what happened next.. After think