问题 填空题

如图是蝗虫的外部形态图.据图回答:

(1)它的身体分为[一]______、[二]______、[三]______.

(2)生活在绿草丛中的蝗虫,它的体色通常是______色,这对蝗虫的生活意义是______.

(3)体表的外骨骼的作用有______.

(4)蝗虫共有______对足,其中适于跳跃的是发达的______.

(5)蝗虫的翅共______对,是它的______器官.

答案

(1)蝗虫的身体分为头、胸、腹三部分,图中一为头部生有触角和口器以及单复眼;二为胸部是蝗虫的运动中心,三为蝗虫的腹部是蝗虫呼吸、生殖中心.

(2)生活在绿草丛中的蝗虫,它的体色通常是绿色,为保护色,有利于蝗虫的捕食和个体生存及种族延续.

(3)由于陆地气候相对干燥,与此相适应,蝗虫的体表具有外骨骼,有保护和支持内部柔软器官、防止体内水分蒸发的作用.

(4)蝗虫的运动器官是两对翅和三对足都着生在胸部.蝗虫的足包括前足、中足和后足,均分节,后足发达,适于跳跃.

(5)蝗虫还有两对翅,前翅革质、狭长,有保护作用,后翅柔软宽大,适于飞行.

故答案为:(1)一;头部;二;胸部;三;腹部;(2)绿;利于捕食和个体生存及种族延续;(3)保护和支持内部柔软器官、防止水分的蒸发;(4)三;后足;(5)两;飞行.

阅读理解

阅读理解。

    Guinea Pigs (荷兰猪) are friendly animals that enjoy being held and seldom bite. They come from South

 America and can live as long as seven or eight years.

     Housing

     Your Guinea Pigs can be kept indoors all year round. They do not like sudden loud noises, so it's best 

 to put their cages in a quiet place. A wooden cage is good, although a metal cage can also be used if it has

 a plastic floor.

     Feeding

     Guinea Pigs only eat grass and other plants. It's important to give them some fresh fruit and vegetables. 

 Fresh drinking water should always be provided in a bottle, and food should be given in bowls, Guinea 

 Pigs will eat plastic!

     Looking after your Guinea Pigs

     Give your Guinea Pigs as much exercise as possible, and provide them with an outdoor run, but be sure

 to keep cats and dogs out of the way.

     Young Guinea Pigs are nervous. For the first few days, talk gently to your Guinea Pigs to build up trust,

  then slowly introduce your hands into the cage. Your Guinea Pigs will become curious and more

 confident around you. After a week or two, try picking up your pets using both hands. This is a good time

 to start feeding your Guinea Pigs something which should be done daily.

1 . How long can a Guinea Pig live?

    A. Five to Six years.

    B. Six to Seven years.

    C. Seven to eight years.

    D. Eight to nine years.

2. What kinds of cages are the best for keeping Guinea Pigs?

    A. Glass cages.

    B. Metal cages.

    C. Plastic cages.

    D. Wooden cages.

3. Which of the following is true according to the passage?

    A. Guinea Pigs like biting their owners very much.

    B. Guinea Pigs can be kept indoors all the time.

    C. Guinea Pigs eat any kind of food, either plants or meat.

    D. Guinea Pigs needn't be fed everyday.

4. What does the passage mainly talk about?

    A. Some kinds of cages for pets.

    B. Guinea pigs from SouLh America.

    C. Different food to feed different pets.

    D. The ways to build up pets' trust.

单项选择题