违反治安管理行为属于（）。 A.治安行政违法行为 B.道路交通行政违法行为 C.犯罪

阅读对话，选择正确的答案。

Alice: Hello, Jane.

Jane: Hello, Alice.

Alice: What day is it today?

Jane: It's Thursday.

Alice: What lessons do you have in the morning, Jane?

Jane: Well, let me see. We have Science, Chinese, Art and Computer Studies.

Alice: What subject do you like, Jane?

Jane: I like Art. How about you, Alice?

Alice:I like Art, too.

Jane: Oh, we like the same subject.

Alice: How many Art lessons do you have in a week?

Jane: Three. I hope we have more.

1. Does Alice like Art, too?    

A. Yes.    

B. No.    

C. I don't know.    

D. She likes.

2. Do Alice and Jane like the same subject?

A.Yes.    

B. No.    

C. I don't know.    

D. Maybe (可能吧).

3. How many Art lessons does Jane have a week?   

A. Two.    

B. Three.    

C. Four.    

D. Five.

4. What lessons does Jane have in the morning?   

A. Science.    

B. Chinese.

C. Art and Computer Studies.    

D. A, B and C.

5. What day is it today?

A. Monday.    

B. Tuesday.    

C. Wednesday.    

D. Thursday.

男性，35岁，右侧睾丸肿大半年入院。行睾丸切除术后病理回报为精原细胞瘤，下一步治疗为

A．腹膜后淋巴结清扫

B．对侧睾丸切除

C．化学治疗

D．免疫治疗

E．放射治疗同时配合化疗

人们通常称为“钢精锅”实际上是铝合金，为什么不能用沙或金属丝球打磨以除去其表面的污渍呢？______．

能否用“钢精”器具盛装酸性物质，试写出用钢精盆盛稀盐酸的化学反应方程式______．

(8分) 已知3A(g)＋B(g) xC(g)＋2D(g)，将等物质的量的A、B混合于2 L的密闭容器中，经5 min后达到化学平衡，此时测得D的浓度为0.5 mol/L，且c(A)∶c(B)＝3∶5。又知5 min 内用C表示的平均反应速率为0.1 mol/(L·min)。求：

（1）反应开始前容器中的A、B的物质的量：n(A)＝n(B)＝________mol；

（2）5min内用B表示的平均反应速率v(B)＝________mol/(L·min)；  

（3）此时A的转化率为_______，x的值为________。

如选调经济警察有困难的，可以招收合同制经济警察，合同期一般为（）年。