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The little boy turned to the old woman next to him, ‘‘Granny, are you sure I don’t have enough money?’’ She nodded. The little boy was still 36 the doll (洋娃娃) in his hand. I walked toward him, 37 who he wished to give this doll to. “Sister. She was sure that Santa Claus would bring a doll to her.” I told him that maybe Santa Claus would do so. But he replied to me 38 . “No, Santa Claus(圣诞老人) can’t bring it to her 39 she is now. I have to give the doll to my mommy so that she can give it to my sister when she 40 there. My sister has gone to be with God. Daddy says that Mommy is going to see God very soon too, 41 I thought she could take the doll with her to give it to my sister.’’ The little boy looked 42 at me, “I told Daddy to tell Mommy not to go yet. I need her to wait until I come back from the mall. I 43 she didn’t have to leave me, but Daddy says that she has to go to be with my little sister.” Then he looked 44 at the doll with sad eyes. I quickly 45 for my wallet. “Let’s check again, just in case you do have enough money for the doll!” “OK. I hope I do have enough.” I added some of my money to 46 without him seeing and we started to count it. There was enough for the doll and 47 some spare money. “Thank you God for giving me enough money!” He looked at me and 48 , “I wanted to have enough money to buy a white rose for my Mommy, but I didn’t dare to ask God 49 too much. But He gave me enough to buy the doll and a white rose. My mommy loves white roses.” 50 I remembered a local newspaper article two days ago, mentioning a drunk man in a truck hit a car 51 by a young woman and a little girl. The little girl 52 right away and the mother was 53  in a critical state. Two days 54 this encounter (偶然相遇) with the little boy, I read in the newspaper that the young 55 had passed away. 小题1: A.raising B.holding C.hiding D.tearing 小题2: A.considering B.understanding C.watching D.asking 小题3: A.proudly B.hurriedly C.sadly D.angrily 小题4: A.where B.what C.who D.when 小题5: A.comes B.finds C.goes D.leaves 小题6: A.so B.for C.but D.as 小题7: A.down B.on C.to D.up 小题8: A.think B.wish C.imagine D.find 小题9: A.then B.sadly C.again D.now 小题10: A.reached B.looked C.searched D.charged 小题11: A.myself B.him C.his D.them 小题12: A.still B.yet C.also D.even 小题13: A.nodded B.added C.laughed D.showed 小题14: A.to B.for C.in D.on 小题15: A.Now B.Therefore C.However D.Then 小题16: A.occupied B.controlled C.attacked D.owned 小题17: A.left B.died C.came D.killed 小题18: A.knocked B.treated C.left D.kept 小题19: A.after B.since C.until D.before 小题20: A.man B.girl C.boy D.woman
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【单选题】下图所示的晶胞类型为()
A.
体心正方晶胞
B.
体心立方晶胞
C.
面心立方晶胞
D.
密排六方晶胞
【判断题】紫外吸收光谱与可见吸收光谱一样,是由k层和L层电子跃迁而产生的。( )
A.
正确
B.
错误
【简答题】下图为一个金属铜的晶胞,请完成以下各题。 1)该晶胞“实际”拥有的铜原子数是 个。 2)该晶胞称为 。 A.六方晶胞     B.体心立方晶胞      C.面心立方晶胞 3)此晶胞立方体的边长为a cm,Cu的相对原子质量为。阿伏加德罗常数为N A 。金属铜的晶体密度 ρ 为 g/cm 3 。(用a、N A 表示)。 4)铜原子采取的这种堆积方式的空间利用率为 。(填数值)
【单选题】机械复述和精细复述的主要区别在于
A.
是否需要意识的参与
B.
个体知识经验参与的多少
C.
复述材料的数量不同
D.
复述材料的性质不同
【单选题】下图所示的晶胞类型为_______。
A.
体心正方晶胞
B.
体心立方晶胞
C.
面心立方晶胞
D.
密排六方晶胞
【单选题】机械复述和精细复述的主要区别在于
A.
是否需要意识参与
B.
个体知识经验参与的多少
C.
复述材料的数量不同
D.
复述材料的性质不同
【简答题】晶胞是构成晶体的基本重复单元.在二氧化硅晶胞中有8个硅原子位   于立方晶胞的8个顶角,有6个硅原子位于晶胞的6个面心,还有4个硅原子与16个氧原子在晶胞内构成4个硅氧四面体,它们均匀错开排列于晶胞内.根据图示二氧化硅晶胞结构,每个晶胞内所含“SiO 2 ”基元数为(  ) A.4个 B.6个 C.8个 D.18个
【判断题】紫外吸收光谱与可见吸收光谱一样,是由K层和L层电子的跃迁而产生。( )
A.
正确
B.
错误
【简答题】已知MgS和MnS的晶胞参数具有相同的数值520pm,而CaS晶胞参数a=567pm,晶胞参数a=480pm,MgO晶胞参数a=420pm,这五种晶体均为NaCl型结构。试求这些体系中的离子半径。
【判断题】xt0502125紫外吸收光谱与可见吸收光谱一样,是由K层和L层电子的跃迁而产生。( )
A.
正确
B.
错误
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