题目

关于温度和内能的理解，下列说法中正确的是( ).A. 温度是分子平均动能的标志，物体温度升高，则物体每一个分子的动能都增大B. 不计分子之间的分子势能，质量和温度相同的氢气和氧气具有相同的内能C. 1g100℃水的内能小于1g100℃水蒸气的内能D. 做功和热传递对改变物体内能是等效的，也就是说做功和热传递的实质是相同的 阅读下面短文，掌握其大意，然后从各题所给的四个选项(A、B、C和D)中，选出最佳选项。 　　The old man went slowly into the restaurant．A young waitress named Mary 　　1　　 him go toward a table by the window． 　　Mary ran 　　2　　 to him, and said, “Here, Sir．Let me give you a 　　3　　 with that chair．” 　　She pulled the chair away from the table．Steadying(使平稳)him with one arm, she helped him move 　　4　　 the chair, and get 　　5　　 seated．Then she leaned his 　　6　　 against the table where he could reach it．In a 　　7　　, clear voice he said, “Thank you, Miss．And bless you for your kind 　　8　　．” “You're welcome, Sir．” She replied．“And my name is Mary．I'll be back in a moment, and if you need 　　9　　 , just wave at me!” 　　　　10　　 he had finished a hearty(丰盛的)meal of pancakes, bacon, and hot lemon tea, Mary 　　11　　 him the change．She helped him up from his chair, and out from behind the table．She handed 　　12　　 his walking stick, and 　　13　　 with him to the front door． 　　Holding the door 　　14　　 for him, she said, “Come back and see us, Sir!” He turned with his whole body, smiled, and nodded．“You are very kind．” he said softly．　　15　　 Mary went to clean his table, she was very 　　16　　．Under his plate she found a business card and a note．Under the note was a one-hundred-dollar bill． 　　The note 　　17　　：“Dear Mary, I respect you very much, and you 　　18　　 yourself too．It shows by the 　　19　　 you treat others．You have found the secret of happiness．Your kind gestures will shine through 　　20　　 meets you．” 　　The man she had waited on was the owner of the restaurant where she worked．This was the first time that she, or any of his employees had ever seen him in person． (1) [　　] A． watched B． helped C． looked D． wanted (2) [　　] A． towards B． over C． away D． outside (3) [　　] A． lift B． change C． ring D． hand (4) [　　] A． behind B． next to C． in the front of D． in front of (5) [　　] A． comfortably B． nervously C． curiously D． actively (6) [　　] A． hat B． walking stick C． coat D． bag (7) [　　] A． hard B． tough C． soft D． cold (8) [　　] A． methods B． minds C． gestures D． thoughts (9) [　　] A． nothing B． everything C． anybody D． anything (10) [　　] A． After B． Before C． As if D． If (11) [　　] A． took B． brought C． passed D． treated (12) [　　] A． her B． them C． him D． it (13) [　　] A． waved B． greeted C． walked D． sent (14) [　　] A． open B． shut C． closed D． opened (15) [　　] A． Unless B． Though C． Now that D． When (16) [　　] A． surprised B． puzzled C． disappointed D． satisfied (17) [　　] A． put B． read C． told D． spoke (18) [　　] A． ignore B． value C． respect D． express (19) [　　] A． way B． smile C． action D． style (20) [　　] A． who B． whom C． anyone D． whoever