装置380V电短时停一条线，下列说法正确的是（）。A、环氧乙烷精制系统停车 B、循环

下列关于重链病的叙述不正确的是（）。

A.血清电泳可见M蛋白区带

B.γ型重链病一般无本周蛋白尿

C.易反复感染

D.属一种良性病变

E.常见的是γ重链病

如图所示，两条足够长的平行金属导轨相距L，与水平面的夹角为q，整个空间存在垂直于导轨平面的匀强磁场，磁感应强度大小均为B，虚线上方轨道光滑且磁场方向向上，虚线下方轨道粗糙且磁场方向向下．当导体棒EF以初速度v₀沿导轨上滑至最大高度的过程中，导体棒MN一直静止在导轨上，若两导体棒质量均为m、电阻均为R，导轨电阻不计，重力加速度为g，在此过程中导体棒EF上产生的焦耳热为Q，求：

（1）导体棒MN受到的最大摩擦力；

（2）导体棒EF上升的最大高度．

行车中当车辆突然爆胎时，驾驶人切忌慌乱中急踏制动踏板，尽量采用“抢挡”的方法，利用发动机制动使车辆减速。

（5分）莽草酸(化学式：C₇H₁₀O₅)是制取抗禽流感药物“达菲”的原料。 请回答：

(1)莽草酸由    种元素组成，分子中C、H、O原子个数比为            。

(2) 从组成上可知莽草酸属于________（填 “有机化合物”或“无机化合物”）；

（3）104.4g莽草酸含氧元素质量为          g。

(4)对1岁以上的儿童推荐按照下列“体重—剂量表”服用“达菲”：

体重	小于等于15千克	15～23千克	23～40千克	大于40千克
每次用量	30mg	45mg	60mg	60mg

   假如患病儿童的体重是20千克，在治疗过程中，需每天服用“达菲”胶囊(每颗胶囊含“达菲”75mg)2次，一个疗程5天，那么该患儿一个疗程共需服用          颗。

第二节 完形填空(共20小题；每小题1.5分，满分30分)

阅读下面短文，选出可以填入空白处的最佳选项，并填在答题卡上。

Dear Kate,

It is very   36__ that you are coming to our school so soon.  37 you arrive, let me introduce  38   you what our school life is like.

Our school is quite famous for its long history. It was   39   in the early 1920s. It is a good place   40__we can prepare ourselves well for the future. We have many wonderful teachers who are always ready to __41___help. __42___we pay a lot of attention to how well we do in lessons, achieving high scores is not the only reason to study. The teachers encourage us to try out new ideas and ask questions. __43__their help we have developed all kinds of interests in both Arts and Science. Students can choose to_44__ any school clubs they are _45___in. We can also choose the subjects that we want to study. Last term I selected American Literature, because I wanted to learn about famous American writers. This term I chose to attend music classes because my father bought me a piano_46__ a birthday present.

__47___, I was elected_ 48___ of my class, __49____it can be _50_ to be a monitor,     __51__I have to do a lot of work and attend many meetings. _52 , being a monitor has taught me a lot, such as caring for others and taking responsibilities and so on. When my class was given the title of “Model Class”, I was __53___than ever before. So being a monitor _54____an important part in my school life .I’m very pleased with my work.

I love my school and hope that you will have a pleasant experience here too. I am looking forward to  55   you soon.

36. A. excited B. exciting      C. excite  D. excitement

37. A. When   B .After  C. Before       D. As soon as

38. A. to  B. for      C. with    D. in

39. A. finded  B. found  C. founded     D. find

40. A. when    B. where C. that     D. which

41. A. gives    B. offer   C. donates      D. ask

42. A. But      B. Because      C. Though      D. So

43. A. Under   B. With   C. For     D. By

44. A. attend   B. join    C. join in D. take part in

45. A. interest B. interesting  C. interested   D. interests

46. A. for       B. as       C. by      D .with

47. A. On the way  B. In the way  C. By the way D. By way of

48. A. the monitor  B. a monitor   C. monitor      D. monitors

49. A. sometime     B. sometimes  C. some time  D. some times

50. A. tired     B. tiring  C. tire     D. tires

51. A. for       B. but     C. so       D. therefore

52. A. But      B. However    C . So     D. And

53. A. proud   B. more proud       C. prider D. prouder

54. A. playB. takes       C. makes                D. plays

55. A.meet      B. meeting      C. meets  D. met