下边的漫画说明了 [ ] A．认识规律要充分发挥主观能动性 B．正确发挥主观能动

阅读理解。

     The students were having their chemistry (化学) class. Miss Li was telling the children what water

was like. After that,she asked her students, "What's water?" No one answered. Miss Li asked again,

"Why don't you answer my question? Didn't I tell you what water is like? "

     Just then a boy put up his hand and said, "Miss Li,you told us that water has no color and no smell

(气味). But where to find such kind of water (这种水)? Then water in the river behind my house is

always black and it has a bad smell." Most often children agreed (同意) with him.

     "I'm sorry,children." said the teacher, "Our water is getting dirtier and dirtier. That's a problem (问

题)."

1. The students were having their _____ class.     

A. English    

B. Chinese    

C. chemistry      

D. math

2. Miss Li was telling the children what _____ was like.    

A. water

B. air

C. earth

D. weather

3. A boy said, "The water in the river behind my house is always _____."

A. white      

B. black      

C. clean          

D. clear

4. Most of the children _____ the boy.

A. agreed with 

B. wrote to    

C. heard from      

D. sent for

5. The water in the river has color and smell because it is getting _____.

A. more and more            

B. less and less

C. cleaner and cleaner          

D. dirtier and dirtier

A community nurse is performing a physical assessment on an 18-month-old child. Which of the following would be best

A. Carry out the assessment from head to toe.
B. Assess motor function by having the child run and walk.
C. Have the mother hold the toddler on her lap.
D. Assess the respiratory and cardiac systems first.

使用( )关键字来跳出try块和进入finally块。

A．catch

B．return

C．while

D．try

汽船以10米/秒速度横渡河流，河对面有座山，船鸣笛后5秒钟驾驶员听到回声，求鸣笛时，船离山多远？（v_声=340米/秒）

起重机械运动部件移动范围大，有多个运动机构，绝大多数起重机械本身就是移动式机械，容易发生碰撞、脱钩、倾翻等事故。在机械行业的12类主要产品中，起重机械属于（）类的机械产品。

A．重型矿山 

B．汽车 

C．石油化工通用 

D．其他