试题与答案

在△ABC中,a=2,A=30 °,C=45 °,则△ABC的面积S△ABC=(

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题目:

在△ABC中,a=2,A=30 °,C=45 °,则△ABC的面积S△ABC=(   )

答案:

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     Young children don't have the skills or knowledge to stay safe in heavy traffic. The following tips (忠告)

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like you. Teach your children to pay attention to traffic lights when you cross the road together with them.

This helps them understand when it's safe to cross. Make sure that you walk between your children and

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     When your children are a little older, you can start to tell them the importance of traffic knowledge. Let

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traffic rules.

     Ask your children to play in a safe place. Never let them ride bikes on the road without an adult present

at rush hour.

     The most important thing you can do to keep your children from getting hurt is to encourage them to

follow traffic rules. After knowing about traffic rules, they'll volunteer to obey them. In this way, they'll be

careful enough to keep themselves away from danger.

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    _____________________________________________________ 

2. Who should set good examples to young children on roads?

    _____________________________________________________

3. When do young children never ride their bikes alone on the road?

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