Until the early 1960s and the late 1970s, a Havard Medical School professor, David Littman made and improved a new stethoscope which was not (29) _________ as the previous ones and had better

29/40

Until the early 1960s and the late 1970s, a Havard Medical School professor, David Littman made and improved a new stethoscope which was not (29) _________ as the previous ones and had better acoustics

so heavier

as heavy

heavier

more heavy

Giải thích

Đáp án đúng: B

Dấu hiệu nhận biết so sánh bằng “as” => Cấu trúc so sánh bằng: S1 + tobe + as + tính từ + as + S2.

Hướng dẫn dịch: David Littman đã chế tạo và cải tiến một chiếc ống nghe mới không nặng bằng những chiếc trước đó và có khả năng cách âm tốt hơn.