如图，该图是为纪念历史上一部重要文献颁布300周年而发行的纪念币。这部重要文献是（）

下列疾病，哪些必须进行粪便消毒（）

A.细菌性痢疾

B.病毒性肝炎

C.副伤寒乙

D.流行性出血热

E.钩端螺旋体病

《中华人民共和国水污染防治法》规定，禁止在水体清洗装贮（）的车辆和容器。

A.过油类或者有毒污染物

B.酸碱类或者有毒污染物

C.粉尘类或者酸碱类

D.过油类或者酸碱类

产品组合策略就是根据企业的目标，对产品组合的宽度、深度及关联程度进行组合决策。

Sometimes I really doubt whether there is love between my parents. They are very busy working to  1  the family. They don’t act in the  2  ways that I read in books or I see on TV. 3  flowers to each other on Valentine’s Day is even more  4 .

One day, my mother was sewing a quilt(床罩). I  5  sat down beside her and looked at her. “Mom, is there love between you and Dad?” I asked her in a  6  voice.

My mother stopped and raised her head with  7 in her eyes. She didn’t answer immediately. Then she  8  her head and continued to sew the quilt. At last my mother said:

“Susan,” she said, “Look at this thread. Sometimes it appears, but most of it  9  in the quilt. The thread really makes the quilt strong and  10 . If life is a quilt, then love should be a  11 .It can hardly be seen anywhere or anytime, but it’s really there. Love is  12 .”

The next spring, my father suddenly got sick seriously. When they returned from the hospital, mother looked rather pale and it seemed  13 of them had had a serious illness. Every day in the morning and dusk, my mother helped my father  14  slowly on the country road. My father had never been so  15. Along the country road, there were many beautiful flowers, green grass and trees. The sun gently glistened through the leaves. All of these  16  the most beautiful picture in the world.

“Dad, how are you feeling now?” I asked him one day. He said gently. “ 17 , I just like walking with your mom. I like this kind of life.”  ___18  his eyes, I know he loves my mother deeply.

 19  I thought love meant flowers, gifts and sweet kisses. But from this  20 ,I understand that love is just a thread in the quilt of our life. Love is inside, making life strong and warm.

1. A. hold                       B. support                      C. live on                      D. keep

2. A. romantic          B. friendly                            C. lovely                D. active

3. A. Taking             B. Passing                      C. Buying               D. Sending

4. A. no problem                                              B. out of question         

C. out of the question                             D. in question

5. A. silently            B. eagerly                      C. peaceful             D. anxiously

6. A. loud                       B. low                           C. gentle                D. tender

7. A. interest            B. fear                           C. excitement          D. surprise

8. A. bowed             B. raised                        C. hang                  D. lower

9. A. lost                 B. turned out                  C. disappeared               D. came up

10. A. cold              B. lasting                       C. long                   D. comfortable

11. A. needle            B. cloth                          C. thread                D. sheet

12. A. in the quilt     B. out of the quilt       C. outside               D. inside

13. A. either            B. both                          C. neither                      D. every

14. A. walk              B. run                            C. stand                  D. exercise

15. A. rude                   B. polite                       C. gentle                D. careful

16. A. came up              B. turned up                 C. called up            D. made up

17. A. In other words     B. To tell the truth     C. In my opinion    D. On the contrary

18. A. Seeing           B. Reading                            C. Watching            D. Observing

19. A. Once                  B. Though                    C. When                D. Unless

20. A. process          B. way                           C. matter               D. experience

圆柱铣刀（）的主要作用是减小后刀面与切削平面之间的摩擦。

A.前角

B.后角

C.螺旋角

D.楔角