Which pair of elements primarily make up a nebula? hydrogen and helium helium and oxygen carbon and o

Question

Which pair of elements primarily make up a nebula?

hydrogen and helium

helium and oxygen

carbon and oxygen

hydrogen and oxygen

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Hưng Khoa 1 year 2021-08-15T04:10:24+00:00 1 Answers 14 views 0

Answers ( )

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    2021-08-15T04:11:45+00:00

    Answer: hydrogen and helium

    Explanation:

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )