The teacher gave some suggestions on what could come out for the examination.
Giải chi tiết:
suggestions = gợi ý, đề xuất
A. tác động
B. triệu chứng
C. gợi ý
D. luận chứng
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.
Population growth rates vary among regions and even among countries within the same region.