以下哪项不属于矿井甲烷的危害。（）A、可以导致爆炸 B、可以导致人员窒息 C、可以导致煤

阅读理解。

       It is summer. It is Sunday. The sun is shining. Jack and Jane go to the beach (沙滩). There are many 

people on it. Grandparents like to walk near the sea. Jack and his friends like kites. They can fly the kite very 

high. Jane and her sister like to swim. A few children like ball games. They are very happy.  

A. 阅读短文，判断正(T)误(F)。          

( ) 1. Today is a shine day.            

(     ) 2. There are some people on the beach.            

(     ) 3. Jack and his friends can't fly the kite very well.            

(     ) 4. Jane and her sister like swimming.           

(     )5. On the beach all the people are very happy.

B. 根据短文，选择正确答案。

1. What's the weather like today?[ ]

A. Sunny.      

B. Windy.       

C. Snowy.

2. Who likes to swim?[ ]

A. Jack.                   

B. Jane.                      

C. Children.

3. They have            today.[ ]

A. them                    

B. a good time            

C. themselves

4. Some children           ball games.[ ]

A. likes            

B. like               

C. like to

5. There            a lot of people on the beach.[ ]

A. is                            

B. am                             

C. are

It’s hard to track the blue whale, which has almost been killed off by commercial whaling. Attaching radio devices to it is difficult and visual sightings are too unreliable to give real insight into its behavior.

So biologists were delighted early this year when, with the help of the US Navy, they are able to track a particular blue whale for 43 days recording its sounds. This was possible because of the Navy’s former top secret system of underwater listening devices across the oceans.

Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies.

Earth scientists announced at a news conference recently that they had used the system for closely observing a deep-sea volcanic eruption for the first time and that they planned similar studies. Other scientists have proposed to use the network for tracking ocean currents and measuring changes in the ocean and global temperatures. Different layers of ocean water can act as channels for sounds focusing them in the same way a stethoscope(听诊器) does when it carries faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.

小题1:The underwater listening system was originally designed _________________.

A．to trace and locate enemy ships

B．to observe deep sea volcanic eruptions

C．to study the movement of ocean currents

D．to replace the global radio communications network小题2:The deep-sea listening system makes use of __________________.

A．the ability of sound to travel at high speed

B．the top-level technology of focusing sounds under water

C．the unique characteristic of layers of ocean water in carrying sound

D．low-frequency sounds traveling across different layers of water小题3:What can we infer from the passage?

A．New radio devices are developed for tracking the blue whales.

B．Blue whales are no longer endangered with the new system.

C．Opinions differ on the use of military technology.

D．Military technology has great potential in civilian use.小题4:What is the passage chiefly about?

A．An effort to protect an endangered marine species.

B．The civilian use of a military detection system.

C．The exposure of a US Navy top-secret weapon.

D．A new way to look into the behavior of blue whales.

财务分析的作用包括( )。

A．财务分析是项目决策分析与评价的重要组成部分

B．财务分析是社会公众的消费倾向与水平

C．财务分析是重要的决策依据

D．财务分析在项目或方案比选中起着重要作用

E．财务分析中的财务生存能力分析对项目，特别是对非经营性项目的财务可持续性的考察起着重要作用

马克思在评价达尔文学说时说：“《物种起源》包含我们的理论的自然科学基础。”马克思所说的“自然科学基础”的含义是（）

A.达尔文否定了上帝创造生物，肯定了生物自然生成

B.“用进废退”和“获得性遗传”是生物进化的两大原则

C.遗传基因在生物进化中起着基础作用

D.自然物种既有联系，又有变异

视图分为（）、（）、（）和旋转视图。