He made another wonderful discovery, _______ of great importance to physics.

A.which I think it is B.which I think it

C.I think which is D.which I think is

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Confidence（自信）is very important in daily life.It can help you to develop a healthy attitude （態(tài)度）.A study shows that the people who are more confident are much happier.They can have more chances to make themselves successful.But how to be more confident?Here are some suggestions:

Speak loudly

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Play sports

Playing sports makes you tired but completely relaxed. When you do sports，you will be full of confidence.

Encourage yourself

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Get rid of（消除）fear

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Pick up what you like to do

If you like singing，sing as much as you can. In some ways，a hobby can make you excellent. And it will make you happy and confident.

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