托福考试

根据网考网考试中心的统计分析，以下试题在2019/7/21日托福考试习题练习中，答错率较高，为：95%
【单选题】The professor mentions the energy that maintains the stars at a high temperature. Where does the energy come from
A、From the conversion of hydrogen to helium.
B、From the internal gravity of the stars.
C、From the conversion of helium to hydrogen.
D、From the light emitted by other stars.
网考网参考答案：A，答错率：95%
网考网试题解析：
[解析] 本题为细节题。题目问：教授在讨论中所提到的保持星体处于高温状态的那些能量来自于哪里 在讨论中，教授问：“Well, how can they keep at such a high temperature... (这些星体何以保持如此的高温呢)”。学生A回答说：“The burning of the energy liberated by the...the thermonuclear reactions in their centers. (星体中心热核反应所释放的能量的燃烧)”。之后教授又进一步解释道：“The energy, say, uh...radiated into space by a normal，so-called ’main sequence’ star，is...generated by the uh...the conversion of hydrogen to helium. (由所谓的常态的‘主序星’辐射入太空的能量是通过氢向氦的转化而产生的。)”简言之，这些保持星体处于高温状态的能量来源于氢向氦的转化，故A为正确选项。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>