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Câu hỏi:

21/07/2024 1,599

Population growth rates vary among regions and even among countries within the same region.

A. fluctuate

B. stay unchanged

Đáp án chính xác

C. restrain

D. remain unstable

Trả lời:

verified Giải bởi Vietjack

Đáp án B

vary: thay đổi >< stay unchanged: không đổi

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