When the laser strikes the chemicals, it releases a form of oxygen that kills cancer cells.
Giải chi tiết:
Đáp án là C. release = give out: đưa ra, phóng thích
Nghĩa các từ còn lại: contain: bao gồm; vaporize:bốc hơi; omit: bỏ sót
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.