Tham khảo tài liệu 'tiếng anh bằng a –l042', ngoại ngữ, chứng chỉ a, b, c phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Tiếng anh bằng A -L042 1 During the 1940 s science and engineering had an impact on the way music reach its audience and even influenced the way in which it was composed. a A b B c C d D 2 By 1860 the railroads of the United States had 3 000 miles of track three-quarters of which it was east of the Mississippi River and north of the Ohio River. a A b B c C d D 3 Ballads were early types of poetry and may have been among a first kinds of music. a A b B c C d D 4 The thin outer layer of the skin is called the epidermis while the layer inner which is slightly thicker is called the dermis. a A b