In 1952, Akihito was officially proclaimed heir to the Japanese throne.
Giải chi tiết:
proclaimed = tuyên bố
A. cài đặt
B. tuyên bố
C. lên án
D. khuyên
Biogas can be utilized for electricity production, cooking, space heating, water heating and process heating.
Population growth rates vary among regions and even among countries within the same region.
Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.