大脑的海马沟回位于（）。 A.额叶 B.枕叶 C.颞叶 D.岛叶 E.顶叶

阅读理解。

     Plants (植物) are very important. This is because plants can make food from air, water and sunlight.

 Animals and man cannot make food from air, water and sunlight. Animals can get their food by eating

 plants and other animals. Man gets his food by eating plants and animals, too. So animals and man need

 plants in order to (为了) live. This is why there are so many plants around us.

     There are two kinds of plants: flowering plants and non-flowering plants. Almost all the trees around us

  are flowering plants. You can know some trees from their flowers and fruit. Non-flowering plants do not

  grow flowers. You can not see many non-flowering plants around you.

     If you look carefully at the plants around you, you will find that there are many kinds of plants. Some

 plants are large and some are small. Most of them are green. Thanks to the plants around us we can live

 on earth.    

1. Which of the following is the most important according to the passage?

    A. Man.                

    B. Plants.

    C. Animals.            

    D. Air, water and sunlight.

2. We need many plants around us because _____.

    A. plants can grow easily

    B. plants are green

    C. we can get what we need from plants

    D. we like all kinds of plants

3. There are _____ non-flowering plants than flowering plants around us.

    A. much fewer                          

    B. much more

    C. much larger                            

    D. much better

4. Which of the following does not come from a plant?

    A. Basket.                    

    B. Bread.

    C. Cabbage.                  

    D. Stone Forest.

5. The best title (标题) for this passage may be _____.

    A. Food from Plants                    

    B. Plants Make Food

    C. Man and Animals                    

    D. Plants Around Us

许多海外赤子虽然长期漂泊海外或侨居异国他乡，却心系祖国。无论是过去还是现在，他们都以不同的方式支持和关注着祖国的建设和发展。这体现出

①海外华侨华人为世界的和平与发展做出了突出贡献 ②拳拳赤子心，悠悠报国情

③华侨华人与祖国同呼吸共命运 ④炎黄子孙一脉相承

A．①②③

B．①③④

C．②③④

D．①②④

二氧化氯的特点是什么？

耐火材料的抗渣性主要与耐火材料的（）有关。

A.化学矿物组成

B.组织结构

C.A和B

D.A或B

移动罩滤池过滤室滤料表面以上的直壁高度应等于冲洗时滤料的（）高度再加保护高。

A.滤层

B.平均

C.最大膨胀

D.水头损失