题目

原子的中心是原子核，原子核是由更小粒子       和      组成的  答案：质子，中子解析:略  完型填空 阅读下面短文，掌握其大意，然后从各题所给的四个选项中，选出可以填入空白处的最佳选项。 The Hand(感恩的心) 　　Thanksgiving Day was near．The first grade teacher gave her class a fun assignment to draw a picture of 　　1　　 for which they were thankful． 　　Most of the class might be 　　2　　 economically disadvantaged, but still many would 　　3　　 the holidays with turkeys and other traditional goodies of the season．These, the teacher thought, would be the 　　4　　 of most of her students’ art．And they were． 　　But Douglas made a 　　5　　 kind of picture．Douglas was a different kind of boy．He was the teacher’s true child of misery, 　　6　　 and unhappy．As other children played at recess, Douglas was likely to stand close by her side．One could only guess the pain Douglas felt 　　7　　 those sad eyes． 　　Yes, his picture was different．When 　　8　　 to draw a picture of something for which he was thankful, he drew a 　　9　　 nothing else．Just a empty hand． 　　His abstract image captured the 　　10　　 of his classmates, Whose hand could it be ? One child guessed it was the hand of a farmer, because farmers 　　11　　 turkeys．Another suggested a police officer, because the police protect and 　　12　　 people．And so the discussion went――until the teacher 　　13　　 forgot the young artist himself． 　　　　14　　 the children had gone on to other assignments, she 　　15　　 at Douglas’ desk, bent down, and asked him whose hand it was．The little boy looked away and murmured, “It’s yours, teacher．” 　　She recalled the 　　16　　 she had taken his hand and walked with him here and there, as she had other student．How 　　17　　 had she said, “Take your hand, Douglas, we’ll go outside．” Or, “Let me show you how to hold your pencil．” Or, “Let’s do this together．” Douglas was most 　　18　　 for his teacher’s hand． 　　Brushing aside a tear, she went on with her work． 　　In fact, people 　　19　　 not always say “thanks”．But they were remember the hand that 　　20　　． (1) [　　] A． anything B． something C． nothing D． everything (2) [　　] A． suggested B． affected C． encouraged D． considered (3) [　　] A． celebrate B． share C． like D． avoid (4) [　　] A． purposes B． subjects C． motivations D． examples (5) [　　] A． good B． encouraging C． different D． exciting (6) [　　] A． merry B． naughty C． weak D． lively (7) [　　] A． behind B． beside C． before D． around (8) [　　] A． ordered B． asked C． forced D． persuaded (9) [　　] A． gift B． person C． hand D． wonder (10) [　　] A． thought B． description C． respect D． imagination (11) [　　] A． raise B． need C． buy D． sell (12) [　　] A． look at B． care for C． take away D． drive off (13) [　　] A． always B． almost C． usually D． therefore (14) [　　] A． Before B． Now that C． Since D． When (15) [　　] A． stared B． aimed C． paused D． glanced (16) [　　] A． chances B． forms C． ways D． times (17) [　　] A． seldom B． often C． soon D． much (18) [　　] A． thankful B． calm C． pleased D． comfortable (19) [　　] A． could B． must C． should D． might (20) [　　] A． move on B． stick above C． reaches out D． help out