By pressing a tiny amount of nitrogen between two diamonds to a pressure of 25 million pounds per square inch, scientists not only were able to transform the gas into a solid, but they also created a semiconductor similar to silicon.
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Anot only were able to transform the gas into a solid, but they also created
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Bnot only were able to transform the gas into a solid but also creating
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Cwere able not only to transform the gas into a solid but to create
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Dwere able not only to transform the gas into a solid but also creating
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Ewere not only able to transform the gas into a solid, but they were also able to create
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正确答案: C