题干

如表是四瓶培养在充足葡萄糖溶液中的等量酵母菌,在通入不同浓度的氧气后,测得其呼吸产生的酒精和CO2的物质量,据表回答问题:

氧浓度

A

B

C

D

产生酒精量  mol

9

6.5

6

0

产生CO2量  mol

9

12.5

15

30

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阅读下面的短文,在空白处填入适当单词,或填入括号中所给单词的正确形式(每空不多于3个单词)

    The first robots were invented in the1920s. Since then robots ____ (appear) in many American films. In some films, they are stronger, faster and cleverer ____ people.

    In real life, robots are ____ (main) used in factories. They do some dangerous and difficult jobs for humans.

    Robots also help disabled(残疾的) people, for example, blind people. Today many blind people have a guide dog ____ (help) them. In the future, guide dogs might be robot dog.

    One kind of robot guide dog has ____ (wheel). It moves in front of the owner. It is very clever. It knows the speed of its owner's walk. The owner ____ (wear) a special belt(带子). This belt sends instructions ____ the owner from the dog, such as "Stop here", "Turn left" or "Turn right".

    In the United States, another kind of robot helps disabled people to take care of ____ (them) in their daily life. The robot hears the sound of its owner's voice. It follows instructions such as "Turn the page" or "Make a cup of coffee".

    Robots are also used in American hospitals. They can do simple jobs. At one hospital, for example, a robot takes meals from the kitchen to patient's rooms. It ____ gets lost because this robot has a map of the hospital in its computer memory.

     ____ robots can help people in many ways, they will never take the place of humans.