【单选题】. 1931 was the year ________ a German company began to make the first tape recorders, _______ could record and play sounds on a tape wound around a round object.
【简答题】According to the author, life learning __________ . [A] could pr one from running risks [B] could be a road full of trials and errors [C] makes a kid independent of his parents [D] teaches a kid ...