ACCORDING TO THE PASSAGE, HELIUM IS ________ A. DIFFICULT TO DE...

câu 2. - DE DAP AN THI THU THPTQGDH VINH
DE DAP AN THI THU THPTQGDH VINH
Câu 2.

According to the passage, helium is ________

A.

difficult to detect

B.

the second-most abundant element in the

universe

C.

the most prevalent element in quasars

D.

the oldest element in the universe

B - Trả lời B ID:316537 (0) Lời giải & Bình luận