什么是工业污染？

激光笔发出的光射到平面镜上，入射角为30°，则入射光线与反射光线的夹角为_______°。

与影像密度、对比度、锐利度都有关的是（）

A.管电流

B.增感屏

C.曝光时间

D.摄影距离

E.定影速度

完形填空（共20小题；每小题1分，满分20分）

阅读下面短文, 掌握其大意, 然后从 21-40 各题所给的四个选项 (A、B、C和D) 中, 选出最佳选项。

It has been difficult to sit on the bench the majority of my high school basketball career. To watch my team from the sideline and   21  ­why I am not good enough to be on the floor.  22  

endless hours of work and devotion, pushing myself through drill after drill, the   23   thing I want is to be a cheerleader. The feeling of being   24   is sometimes too much and drives me to

25   on the spot. I often feel as though my efforts are wasted and my time is eaten away, devoted to   26   .  

It is heartbreaking to be a spectator(旁观者) for the game I love, knowing that no one has enough   27   to give me the chance to   28  on the floor. Tears well up, but I hold them back. I shouldn’t be so   29   over something so silly.

Away from the game, it’s easier to put my thoughts together,   30   letting my emotions drive my reasoning. I consider   31   I am where I am. I have played basketball my whole life. I have a passion for the   32   and always have. There is nothing like the excitement of   33  : the swish of the net, the sweat rolling off my cheeks, even the bruises(青肿) are battle wounds worn   34   after every game.

Even if I don’t play much, I participate in every   35  . I am part of a team of girls who

36    together like a family. I am there for them,   37   they are for me.

Should I move on? Or should I stay with my team and pursue my passion just a little longer?

The decision isn’t difficult when I consider the   38    that being a part of a team brings me— and not just any team,   39  my team. I love basketball and my teammates. When I think about that, my view from the bench really isn’t so bad    40   .

21. A.consider                  B. wonder                 C. think                         D. hesitate

22. A. Since                          B. During                C. After                         D. Before

23. A. other              B. next                          C. first                           D. last

24. A. worthless               B. hopeless                C. helpless                        D. careless

25. A. fight                      B. quit                     C. transform                   D. retire

26. A. something              B. nothing                 C. anything                    D. everything

27. A. sympathy              B. encouragement      C. permission                    D. faith

28. A. respond              B. perform                     C. promote                            D. practice

29. A. scared                    B. nervous                 C. upset                         D. amazed

30. A. less than                 B. more than            C. other than                    D. rather than

31. A. why                    B. how                          C. whether                     D. what

32. A. bench                    B. sport                    C. drill                        D. battle

33. A. waiting                B. watching              C. learning                            D. playing

34. A. proudly                B. bravely                C. unfortunately               D. painfully

35. A. decision                  B. plan                     C. game                          D. project

36. A. compete               B. stick                    C. live                           D. represent

37. A. because                B. if                      C. as                              D. though

38. A. joy                    B. patience              C. challenge                         D. position

39. A. so                             B. as               C. but                             D. like

40. A. above all           B. after all                C. at all                          D. all in all

在开放式创新模式下，企业和外部环境的边界变得多孔疏松，易于渗透。

某公司承接高档公寓工程，该工程总建筑面积约38000m²，地下3层，为人防和车库，采用地下连续墙工艺；地上13层，1～3层为公共建筑，4层以上为高档住宅。主体结构形式为框架一剪力墙结构，筏板基础，结构跨度大，结构形式复杂，钢筋采用 HPB235级和HRB335级，钢筋接头采用绑扎、气压焊，地下混凝土采用C35/P8级，地上混凝土采用C30级和C25级。

地下连续墙适用于深基坑开挖和地下建筑的临时性和永久性的（）维护结构。

A．挡土

B．防水

C．沉桩

D．浇注