1. (2019九上·兴化月考) 阅读短文，根据短文内容回答问题。

    If you dropped a piece of fruit on your computer keyboard, would you think about eating it again? What if you dropped it in the toilet? Bacteria can live everywhere, even in some unexpected places.

    If you eat at your computer, sneeze on your keyboard, or sit down to surf the Internet without first washing your hands, your computer keyboard could be bad for your health. According to the US National Research Centre, the average computer carries 400 times more bacteria than a toilet bowl does.

    Could one of the dirtiest things in your home be right in your hand? Yes: the TV remote control. It gets dropped on the floor, put on the sofa and everyone in the house holds it. Scientists found that about half of the tested remote controls carry the cold virus.

    Don't forget your toothbrush. Do you put it in the bathroom? Studies show that flushing the toilet releases bacteria in the air. Bacteria can remain in the air for at least two hours. They may pollute your toothbrush. You can find ways to solve this problem. Try to keep your toothbrush far from the toilet. Make sure that it is in an upright position after each use. It's also important to change your toothbrush every three months.

    Here are some other places to watch out for:

    At home

    The kitchen is one of the places with the most bacteria—more than the bathroom. Dishcloths and kitchen sponges are great places for bacteria since they are always wet after being used. Try to make them dry.

    At school

    When you put your schoolbags on the floor or in the bus, many bacteria can live on the bottom of it. Try to clean your schoolbag often.

    In public places

    Escalator handrails, shopping cart handles, public books and magazines are top bacteria carriers. That's why the first thing to do when getting home is to wash your hands.

    Yes, bacteria are everywhere. But don't be too afraid to touch those things. Most of bacteria are harmless. Just remember to wash your hands regularly. It is the most useful way to protect yourself from bacteria and viruses.

    Answer the following questions with no more than 6 words.

1. （1） Where can bacteria live?
3. （2） How many of the tested remote controls carry the cold virus?
5. （3） How often should you change your toothbrush?
7. （4） Why are dishcloths and kitchen sponges good places for bacteria?
9. （5） How can you protect yourself from bacteria and viruses?