[单项选择]3.Born to be Big
In 2006 scientists at the Harvard School of Public Health reported that the prevalence of obesity (肥胖) in infants under 6 months had risen 73 percent since 1980. "This epidemic of obese 6 - month - olds," as Robert Lustig of the University of California, San Francisco, calls it, poses a problem for conventional explanations of the fattening of America. "Since they’ re eating only formula (配方奶) or breast milk, and never exactly got a lot of exercise, the obvious explanations for obesity don’t work for babies," he points out. "You have to look beyond the obvious. "
The search for the non - obvious has led to an early - life exposure to Paces of chemicals in the environment. Evidence has been steadily accumulating that certain hormone - mimicking pollutants (污染物质), ubiquitous (到处存在的) in the food chain, have two previously effects. They act on genes in the developing fetus (胎儿) and newborn to turn more precursor (前体) cells into fat cells, which stay with you for
A. Right
B. Wrong
C. Not mentioned

[单项选择]3.Born to be Big
In 2006 scientists at the Harvard School of Public Health reported that the prevalence of obesity (肥胖) in infants under 6 months had risen 73 percent since 1980. "This epidemic of obese 6 - month - olds," as Robert Lustig of the University of California, San Francisco, calls it, poses a problem for conventional explanations of the fattening of America. "Since they’ re eating only formula (配方奶) or breast milk, and never exactly got a lot of exercise, the obvious explanations for obesity don’t work for babies," he points out. "You have to look beyond the obvious. "
The search for the non - obvious has led to an early - life exposure to Paces of chemicals in the environment. Evidence has been steadily accumulating that certain hormone - mimicking pollutants (污染物质), ubiquitous (到处存在的) in the food chain, have two previously effects. They act on genes in the developing fetus (胎儿) and newborn to turn more precursor (前体) cells into fat cells, which stay with you for
A. Right
B. Wrong
C. Not mentioned

[单项选择]Scientists are eager to talk with other scientists working on similar problems.
A. 科学家热衷于与从事类似课题研究的其他科学家交流。
B. 科学家更容易与其他科学家谈话来解决相同的问题。
C. 科学家很乐意在解决类似问题时同其他科学家交流。
D. 科学家更容易就雷同的问题与其他科学家交流。

[单项选择]Only computer scientists understand the architecture of personal computers, and only those who understand the architecture of personal computers appreciate the advances in technology made in the last decade. It follows that only those who appreciate these advances are computer scientists.
Which one of the following most accurately describes a flaw in the reasoning in the argument
A. The argument contains no stated or implied relationship between computer scientists and those who appreciate the advances in technology in the last decade.
B. The argument ignores the fact that some computer scientists may not appreciate the advances in technology made in the last decade.
C. The argument ignores the fact that computer scientists may appreciate other things besides the advances in technology made in the last decade.
D. The premises of the argument are stated in such a way that they exclude any possibility of drawing any logical conclusion.
E. (E) The premises of the argument presuppose that everyone understands the architecture of personal computers.

[填空题]Scientists have discovered that plants themselves produce many poisonous chemicals for{{U}} (36) {{/U}}against insects. But insects have developed ways of{{U}} (37) {{/U}}with them and, in fact, have been eating plants for about 250 million years. Now insects are using these same{{U}} (38) {{/U}}to deal with man-made poi sons--insecticides. This is why{{U}} (39) {{/U}}of insects to insecticides has developed so{{U}} (40) {{/U}} What should be done Scientists studying the problem suggest that farmers use less insecticides. At the moment, farmers{{U}} (41) {{/U}}spray crops as a{{U}} (42) {{/U}}against problems that are caused by large number of pests. They should, instead, spray only where pests have actually been seen. Secondly, farmers could use a{{U}} (43) {{/U}}of two or three insecticides at once.{{U}} (44) {{/U}} The most surprising suggestion, perhaps, is that at certain times of the year,{{U}} (45) {{/U}}. The new insects will mate with those which

[单项选择]Scientists use observation and experimentation to examine a specific concept （） existing theories and principles.
A. in the light of
B. in view of
C. as to
D. in the interest of

[填空题]Scientists gather information about climate systems and use this information to ______.

[单项选择]
Understanding how nature responds to climate change will require monitoring key life cycle event-flowering, the appearance of leaves, the first frog calls of the spring all around the world.
But ecologists can’t be everywhere so they’re turning to non-scientists, sometimes called citizen scientists, for help.
Climate scientists are not present everywhere. Because there are so many places in the world and not enough scientists to observe all of them, they’re asking for your help in observing signs of climate change across the world. The citizen scientist movement encourages ordinary people too observe a very specific research interest--birds, trees, flowers budding, etc. and send their observations to a giant database to be observed by professional scientists. This helps a small number of scientists track a large amount of data that they would never be able to gather on their own. Much like citizen journalists
A. To study when plants will have their first buds.
B. To find out the types of plants in the neighborhood.
C. To collect life cycle data on a variety of common plants from across the United States.
D. To investigate how plants and animals will respond as the climate changes.