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Science

共有 30 道题

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Physics 共9题

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单选题

Besides eating foods rich in calcium, what is another way to help strengthen your muscles and bones?

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单选题

An astronomer measured the distance between two stars. The distance the astronomer recorded was prob...

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138

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单选题

In the core of a star, the temperature can reach heights unknown on earth. The process by which star...

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149

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单选题

Which of the following would be measured using kilometers?

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143

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单选题

A scientist is attempting to classify a large object in space. The scientist has determined that the...

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144

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单选题

Some kinds of telescopes contain lenses. The lens of a telescope

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144

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单选题

Astronauts are much lighter when they walk on the moon than they walk on earth. This is because of (...

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单选题

Which of the following is NOT a benefit of scientifically obtained evidence?

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单选题

A guess about the probable outcome of an experiment is called ( )?

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137

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