问题 填空题

(8分)原子序数依次增大的A、B、C、D四种短周期元素。元素A的原子半径在短周期中最小,元素C的单质在空气中含量最多,D所在周期的各元素单质沸点变化如图I(原子序数按递增顺序连续排列)。B、C、D三种元素均能与A形成等电子的三种分子,且化合物中各原子的个数比为:

化合物
原子个数比B∶A=1∶3C∶A=1∶2D∶A=1∶2
 

(1)元素D在元素周期中的位置                    

(2)B、C形成的一种化合物X是一种原子晶体,晶体中B、C原子均达到稳定结构,则X的化学式为            ;X的熔点       金刚石(填“大于”、“等于”或“小于”)。

(3)写出图I中沸点最高的单质与NaOH溶液反应的离子方程式                  

答案

(8分,每空2分)⑴第三周期第VIA族;⑵C3N4、大于;⑶2Al+2OH+2H2O=2AlO2+3H2

填空题
完形填空

SECTION B (18 points)

Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with word or phrases that best fits the context.

There was once a lonely girl who wanted so much for love. One day while she was walking in the woods she found two starving (挨饿的) birds. She took them home and put them in a small  36 . She treated them with love and the birds grew  37 . Every morning they  38  her with a wonderful song. The girl felt great love for the birds.

One day, the girl left the door with the cage open. The  39  and stronger of the two birds flew from the cage. The girl was worried that he  40  fly away,so as he flew close, she caught him wildly. Her heart felt glad at her success in capturing (捕获) him. Suddenly she felt the bird go limp (无力的). She opened her hands  41  looked at the dead bird. Her strong love had killed him.

She noticed  42  bird moving slowly to the edge of the cage. She could feel his great need for  43 . He needed to fly into the blue sky. She lifted him from the cage and let him go. The bird  44  once, twice, three times over her head.

The girl watched happily at the sky. Her heart was no longer worried about her loss. She wanted the bird to be happy. Suddenly, the bird flew  45  and landed softly on her shoulder. He  46  the sweetest song for her that she had ever heard.

The fastest way to  47  love is to hold on to it too tight; the best way to keep love is to give it WINGS.

36. A. cage                   B. box                      C. house                   D. bag

37. A. old                     B. tall                          C. strong                      D. weak

38. A. showed         B. gave                 C. greeted                     D. followed

39. A. smaller        B. weaker                     C. taller                        D. larger

40. A. will                    B. would                     C. should                      D. must

41. A. but              B. or                     C. and                      D. so

42. A. another            B. the other               C. others                  D. some

43. A. food              B. space                   C. love                    D. freedom

44. A. walked           B. left                           C. circled                  D. ran

45. A. closer             B. away                   C. farther                        D. down

46. A. sang              B. danced                        C. flew                    D. wrote

47. A. get               B. lose                   C. remain                  D. find