请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
3：Earth scientists have come to understand that climate ______.
A.is going through a fundamental change
B.has been getting warmer for 10,000 years
C.will eventually change from hot to cold
D.has gone through periodical changes
答案
更多“3：Earth scientists have come to understand that climate ______.A.is going through a fundam”相关的问题
第1题
Scientists believe that uranium was absorbed by the Earth when it was formed.
A．Y
B．N
C．NG
第2题
［A］an environment without ultraviolet light
［B］a lot of homes
［C］an Earth like environment
［D］an environment with atmosphere
第3题
Earth scientists have come to understand that climate______.
A．is going through a fundamental change
B．has been getting warmer for 10 000 years
C．will eventually change from hot to cold
D．has gone through periodical changes
第4题
第5题
A．Y
B．N
C．NG
第6题
Many scientists hold that global warming can be controlled by.
A．reducing the polar bear population.
B．paying more attention to the earth's rising temperatures
C．reducing carbon dioxide emissions
D．refreezing the polar ice caps
第7题
The scientists are not sure______.
A．how long the ice age lasted
B．where ice sheets (冰川) melted during the ice age
C．what caused the temperature changes
D．what the earth is made up of
第8题
Many scientists hold that global warming can be controlled by ______.
A．reducing the polar bear population
B．paying more attention to the earth's rising temperatures
C．reducing carbon dioxide emissions
D．refreezing the polar ice caps
第9题
Which of the following is true of the Glomar Challenger？
A．It is a type of submarine made especially for a project.
B．It is as ongoing project to explore the earth.
C．It provides such strong evidence that all earth scientists agree on the theories of plate tectonics and continental drift.
D．It makes great contribution to the understanding of the earth's structure.
第10题
根据以下材料，回答题
What Is the Coolest Gas in the Universe？
What is the coldest air temperature ever recorded on the Earth？ Where was this low temperature recorded？ The coldest recorded temperature on Earth was -91℃ which__________（1） in Antarctica in 1983.
We encounter an interesting situation when we discuss temperatures in__________ （2）.
Temperatures in Earth orbit actually range from about +120~C to -120~C. The temperature depends upon __________（3） you are in direct sunlight or shade. Obviously， -1200C is colder than our body can safely endure. Thank NASA science for well-designed space __________（4） that protect astronauts from these temperature extremes.
The space temperatures just discussed affect only our area of the solar __________（5）.
Obviously， it is hotter closer to the Sun and colder as we travel away from the Sun. Astronomers estimate temperatures at Pluto are about -210~C. How cold is the lowest estimated temperature in the entire universe？ Again， it depends upon your __________（6）. We are taught it is supposedly__________ （7） to have a temperature below absolute zero， which is-273"C， at which atoms do not move. Two scientists， whose names are Cornell and Wieman， have successfully cooled down a gas temperature barely __________（8） absolute zero. They won a Nobel Prize in Physics in 2001 for their work —— not a discovery， in this case.
Why is the two scientists" work so important to science？
In the 1920s， Satyendra Nath Bose was studying an interesting__________（9） about particles we now call photons. Bose had trouble__________（10） other scientists to believe__________（11）he contacted Albert Einstein. Einstein"s calculations helped him theorize__________（12） behave as Bose thought——but only at very cold temperatures.
Scientists have also discovered that__________ （13） atoms can help them make the world"s atomic clocks even more accurate. These clocks are so accurate today they would only lose one second__________ （14） six million years! Such accuracy will help us travel in space because distance is velocity times time （d——vxt）. With the long distances involved in space __________（15） to know time as accurately as possible to get accurate distance.
回答（1）题 查看材料
A.opened
B.occurred
C.opposed
D.operated
