C.radiation is absorbed by heliumD.nuclei of hydrogen atoms collide 相关知识点: 试题来源: 解析 D [分析] 本题考点为细节题。参看文章第三句“This energy is liberated at the center of the Sun as billions upon billions of nuclei of hydrogen atoms collide with each other and fuse together to ...
B.gamma radiation escapes from the spectrumC.radiation is absorbed by heliumD.nuclei of hydrogen atoms collide 相关知识点: 试题来源: 解析 D 根据第一段第3句:“当亿万氢原子核互相碰撞并形成氢核时,这种能量自太阳中心被释放出来。”由此可推断D项为正确。反馈 收藏 ...
15.When deeplyabsorbed (absorb) in work,he always forgets all about eating or sleeping. 试题答案 分析 当全身心投入工作时,他总会忘了吃饭睡觉. 解答 答案:absorbed考察短语be absorbed in 意为全身心投入,when 引导一个时间状语从句,省略了he is. 点评 考生需在具体语境中灵活使用短语.练习...
energy C. practice D. strength 60. A. developing B. showing C. finding D. knowing 免费查看参考答案及解析 题目: After your friend taking this kind of pill for some time, his hair might fall out or he might have health problems, some of ___ may even affect his liver and heart. A...
He is busy when he works.A.aB.anC.theD.不填 免费查看参考答案及解析 题目: [中考英语下半期中考真题] When you do some running, you have a lot of energy which comes from the movement of your body. When you suddenly stop, your body loses this energy. We already have watches and ...
Research shows that when we are absorbed in an activity,even minor distractions (分心) can have a huge effect. Ac-cording to a study, regaining our 1 drive following an in-terruption can take about 20 minutes.Multitasking(多任务), as many studies have shown, is a myth (谬论). A more...
(30分)Research shows that when we are absorbed in an activity, even minor distractions (分心) can have a huge effect. According to a study, regaining our 1 drive following an interruption can take about 20 minutes. Multitasking (多任务), as many studies have shown, is a myth (谬论). ...
aImpact energy (notch toughness). A measure of the energy absorbed during the fracture of a specimen of standard dimensions and geometry when subjected to very rapid (impact) loading.Charpy and Izod impact tests are used to measure this parameter, which is important in assessing the ductile to...
The intensity of sunlight at the Earth is 1.4 \times 10^3 \; W/m^2, but only half of this energy A fuel has heat of combustion equal to 30 kJ/g. How much energy is released when 5 kilograms are oxidized? How much energy is absorbed when 10 grams of...
“Beingdepressedcanleaveyoufeelinglowinenergy,whichmightputyouoffbeingmore active.Regularexercisecanboostyourmoodifyouhavedepression,andit?sespeciallyusefulfor peoplewithmildtomoderate(中等的)depression,”itwroteonitswebsite. Itseemslikenothingcanbeatthatfeelingwegetafteragoodworkout,evenifwedon?tfully understan...