题目

在装有水的烧杯中分别加入以下物质，其中形成的溶液温度降低的是(    ) A. 生石灰         B. 氢氧化钠 C. 氯化钠         D. 硝酸铵 答案：D 【解析】生石灰和水反应放热，氢氧化钠溶于水放热，氯化钠溶于水温度基本不变，硝酸铵溶于水后溶液的温度降低，故选D。 完形填空 　　Edie was nine years old, and she was tinier than other children of her age．One day, she ran home crying loudly, because she was 　　1　　 by the three new girls of her school．They picked her as the object of their 　　2　　 and threatened to beat her up．Edie's mother held her 　　3　　 and comforted(安慰)her．She 　　4　　 the next day that the girls had been troublemakers at several other schools and they were being given one more　　　5　　 at a new beginning． 　　Edie's 　　6　　 said ,“Be kind to your enemies, Edie．”She 　　7　　 said, “When the girls 　　8　　 to threatened you next time ,tell them you want to be their friend．”“Are you 　　9　　 enough to do that?”Edie's mother asked．The 　　10　　 girl answered, “Yes, Mom, I'll try．” 　　Every day, the girls pushed Edie and called her names and 　　11　　 to get in a poke(戳)or two．Each time, Edie looked up at them and said, “ I'd really like to be your 　　12　　．”But it seemed that this wasn't working． 　　Then one day the following week, Edie ran home as 　　13　　 as she could , shouting ,“Mom, guess what happened today!Just like I 　　14　　 did, I said I'd really like to be their friend, and one of the 　　15　　 said ,‘Okay, Edie, we 　　16　　 and we'll be your friends'”A short time later, Edie sat at a table with them and 　　17　　 their tutor(私人教师)． 　　Towards the end of the school year, 　　18　　 Edie's parents went to school for a parent-teacher conference, the teacher told 　　19　　 ,“Because of Edie's kindness, those girls have completed 　　20　　 and are model students in the class．” (1) [　　] A． frightened B． encouraged C． cheated D． saved (2) [　　] A． shame B． surprise C． anger D． fear (3) [　　] A． suddenly B． unwillingly C． curiously D． softly (4) [　　] A． expressed B． admitted C． learned D． believed (5) [　　] A． time B． chance C． lesson D． trouble (6) [　　] A． sister B． father C． mother D． teacher (7) [　　] A． again B． also C． once D． just (8) [　　] A． start B． agree C． refuse D． forget (9) [　　] A． kind B． brave C． strong D． clever (10) [　　] A． weak B． foolish C． selfish D． tiny (11) [　　] A． chose B． promised C． volunteered D． tried (12) [　　] A． friend B． classmate C． enemy D． neighbor (13) [　　] A． fast B． carefully C． late D． safely (14) [　　] A． never B． seldom C． always D． often (15) [　　] A． boys B． students C． players D． girls (16) [　　] A． grow older B． give up C． set off D． become worse (17) [　　] A． became B． helped C． invited D． found (18) [　　] A． if B． when C． because D． before (19) [　　] A． her B． him C． us D． them (20) [　　] A． stayed up B． broken down C． turned around D． fallen