The nucleus of the atom is composed of swiftly moving protons and neutrons that are held together by very strong forces.

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问题 The nucleus of the atom is composed of swiftly moving protons and neutrons that are held together by very strong forces.

选项 A、mixed
B、propelled
C、pounded
D、bound

答案D

解析聚在一起

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本试题收录于：职称英语卫生类B级题库职称英语分类

职称英语卫生类B级

职称英语

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The nucleus of the atom is composed of swiftly moving protons and neutrons that are held together by very strong forces.

职称英语卫生类B级

职称英语

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