Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đầy đủ đáp án (Đề 9)

According to Einstein's special theory of relativity,  A. all properties of matter and energy can be explained in a single mathematical formula       B. light is composed of separate packets

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According to Einstein's special theory of relativity, _______.

all properties of matter and energy can be explained in a single mathematical formula

light is composed of separate packets of energy

time and motion are relative to the observer

some solids emit electrons when struck by light

Giải thích

Đáp án: C