更多"These batteries for electric cars, "的相关试题:
[单项选择]Approximately how many electric cars are now on California roads
A. 200
B. 2,000
C. 20,000
D. 200,000
[单项选择]
Text 2
Scientists have long warned that some level of global warming is a done deal—due in large part to heat-trapping greenhouse gases humans already have pumped skyward. Now, however, researchers are fleshing out how much future warming and sea-level rise the world has triggered. The implicit message: "We can’t stop this, so how do we live with it" says Thomas Wigley, a climate researcher at NCAR.
One group, led by Gerald Meehl at NCAR, used two state-of-the-art climate models to explore what could happen if the world had held atmospheric concentrations of greenhouse gases steady since 2000. The results: Even if the world had slammed on the brakes five years ago, global average temperatures would rise by about 1 degree Fahrenheit by the end of the 21st century. Sea levels would rise by another 4 inches over 20th-century increases. Rising sea-levels would continue well beyond 2100, even without adding water from melting glaciers and i
A. the impact of climate change is relatively minor.
B. the global warming is inevitable in the near future.
C. concentrations of greenhouse gases cannot beheld steady.
D. the atmospheric conditions will be better than people think.
[单项选择]After scientists did some research ______ the health of workers, the government tried to find some way to meet their demand.
A. into
B. off
C. about
D. for
[单项选择]Why are some scientists interested in studying senescence
A. They want to increase the general ability of our bodies.
B. They may be able to find a better way to our life.
C. If they can pin down the biochemical process that makes us age, there will be hope for extending the length of life.
D. They want to find out if there is a link between how efficiently a cell could repair itself and how long a creature lives.
[单项选择]Some scientists believe that there is no evidence that cholestrol in food is directly linked to ______.
A. blood disease
B. heart disease
C. infectious disease
D. mental disorder
[单项选择]Some scientists believe that a breakthrough in the use of solar energy depends on _________.
A. advanced technology
B. further experiments
C. sufficient funding
D. well-equipped laboratories
[单项选择]Some scientists believe that dolphins have a language of their own.
[单项选择]Some scientists believe that global warming could（ ）.
A. modify ocean currents.
B. change wind directions in the polar regions.
C. reduce the influence of currents.
D. increase wind speed.
[单项选择]According to some social scientists, teenage girls who become pregnant are more ______ to drop out of school than those who don’t.
A. like
B. possible
C. possibly
D. likely
[单项选择]Some scientists have suggested that Earth is a kind of zoo or wildlife ______ for intelligent space beings, like the wilderness areas we have set up on earth to allow animals to develop naturally while we observe them.
A. conservation
B. maintenance
C. storage
D. reserve
[单项选择]What did some scientists try to explain by suggesting that stars repel each other
