题目

计算下面各图形的体积。（单位：cm） 答案：【答案】31.4cm3；25.12cm3【解析】圆柱体积＝底面积×高，S＝π；圆锥体积＝×底面积×高，据此求解。（1）r＝d＝×2＝1（cm）V＝πr2h＝3.14×12×10＝31.4（cm3）答：它的体积为31.4cm3。（2）V＝πr2h＝×3.14×22×6＝25.12（cm3）答：它的体积为25.12cm3。 完形填空 先阅读短文，掌握其大意。然后从各小题所给的A、B、C、D四个选项中选出可以填入相应空白处的最佳答案。 Music and Behavior 　　Where did you go yesterday? Did you hear 　　1　　 at any of those places? Today most stores and restaurants play music．You might 　　2　　 hear music in an office or on a farm． 　　Scientists believe that music changes the 　　3　　 people behave(举止)．According to some scientists, the sound of western classical(古典的)music makes people 　　4　　 richer．When a restaurant plays classical music, people spend 　　5　　 money on food and drinks．When the restaurant plays 　　6　　 music, people spend less money．With 　　7　　 music, people spend even less． 　　Scientists also 　　8　　 that loud, fast music makes people eat faster, In fact, people 　　9　　 their food faster when the music gets faster．Some restaurants play fast music during their 　　10　　 hours．This gets people to eat faster and leave quickly．Restaurants 　　11　　 make spend even less． 　　Some scientists think that music makes you think and learn better．They say 　　12　　 music helps students to be more active．It is true that people learn better when they are 　　13　　．And listening to music can help you relax． 　　The 　　14　　 time you hear music somewhere, be 　　15　　．It might change the way you do things． (1) [　　] A． music B． stories C． songs D． sound (2) [　　] A． already B． even C． hardly D． never (3) [　　] A． way B． time C． idea D． place (4) [　　] A． become B． get C． feel D． look (5) [　　] A． much B． more C． little D． less (6) [　　] A． pop B． modern C． light D． country (7) [　　] A． no B． much C． any D． some (8) [　　] A． think B． hope C． realize D． believe (9) [　　] A． cook B． order C． eat D． make (10) [　　] A． free B． busy C． happy D． sad (11) [　　] A． can B． should C． can't D． needn't (12) [　　] A． how B． why C． what D． that (13) [　　] A． excited B． interested C． confident D． relaxed (14) [　　] A． first B． second C． next D． last (15) [　　] A． quiet B． quick C． happy D． careful