【单选题】
What Is theCoolest Gas in the Universe
What is the coldest air temperature ever recorded on theEarth Where was this low temperature recorded The coldest recorded temperature onEarth was -91℃, which (51) inAntarctica in 1988.
We encounter an interesting situation when we discuss temperatures in (52) . Temperatures inEarth orbit actually range from about 20℃ to 120℃. The temperature depends upon (53) you are in direct sunlight or shade. Obviously, -120℃ is colder than our body can safely endure. Thank NASA、science for well-designed space (54) that protect astronauts from these temperature extremes.
The space temperatures just discussed affect only our area of the solar (55) . 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℃. How cold is the lowest estimated temperature in the entire universeAgain, it depends upon your (56) . We are taught it is supposedly (57) to have a temperature below absolute zero, which is -273℃, at which atoms do not move. Two scientists, whose names areCornell and Wieman, have successfully cooled down a gas to a temperature barely (58) 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 NathBose was studying an interesting (59) about special light particles we now call photons.Bose had trouble (60) other scientists to believe his theory, (61) he contactedAlbertEinstein.Einstein’s calculations helped him theorize that atoms (62) behave asBose thought—but only at very cold temperatures.
Scientists have also discovered that (63) atoms can help them make the world’s atomic docks even more accurate. These clocks are so accurate today they would only lose one second (64) six million years! Such accuracy will help us travel in space because distance is velocity times time (d=vt). With the long distances involved in space (65) , we need to know time as accurately as possible to get accurate distance.
A、willB、would C、must D、can
网考网参考答案：B
网考网解析：
[解析] 本句主句中的谓语动词用的是过去时helped，根据“主句为过去时态，宾语从句一般也要用过去时态”这一时态一致的原则，本题要选would。故本题选B。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
What is the coldest air temperature ever recorded on theEarth Where was this low temperature recorded The coldest recorded temperature onEarth was -91℃, which (51) inAntarctica in 1988.
We encounter an interesting situation when we discuss temperatures in (52) . Temperatures inEarth orbit actually range from about 20℃ to 120℃. The temperature depends upon (53) you are in direct sunlight or shade. Obviously, -120℃ is colder than our body can safely endure. Thank NASA、science for well-designed space (54) that protect astronauts from these temperature extremes.
The space temperatures just discussed affect only our area of the solar (55) . 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℃. How cold is the lowest estimated temperature in the entire universeAgain, it depends upon your (56) . We are taught it is supposedly (57) to have a temperature below absolute zero, which is -273℃, at which atoms do not move. Two scientists, whose names areCornell and Wieman, have successfully cooled down a gas to a temperature barely (58) 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 NathBose was studying an interesting (59) about special light particles we now call photons.Bose had trouble (60) other scientists to believe his theory, (61) he contactedAlbertEinstein.Einstein’s calculations helped him theorize that atoms (62) behave asBose thought—but only at very cold temperatures.
Scientists have also discovered that (63) atoms can help them make the world’s atomic docks even more accurate. These clocks are so accurate today they would only lose one second (64) six million years! Such accuracy will help us travel in space because distance is velocity times time (d=vt). With the long distances involved in space (65) , we need to know time as accurately as possible to get accurate distance.
A、willB、would C、must D、can
网考网参考答案：B
网考网解析：
[解析] 本句主句中的谓语动词用的是过去时helped，根据“主句为过去时态，宾语从句一般也要用过去时态”这一时态一致的原则，本题要选would。故本题选B。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
发布评论 查看全部评论