The word "rudimentary" in paragraph 2 is closest in meaning to _______________. A. undeveloped B. growing C. necessary D. uninteresting

Đáp án A

Từ “ rudimentary” [ thô sơ] ở đoạn 2 gần nghĩa nhất với

A. kém phát triển                                                    B. đang phát triển

C. cần thiết                                                                D. không thú vị

Dẫn chứng: In the early nineteenth century, the knowledge of the physics of heat, which was essential to a science of refrigeration, was rudimentary.