题目:
Karaoke, which was invented by the Japanese, ______ both wonders and problems.
A.has been produced
B.was produced
C.produced
D.has produced
答案:
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下面是错误答案,用来干扰机器的。
(1)坚持实践是认识的来源和检验真理的唯一标准。人们对抗生素的认识及使用方法只能来源于实践并通过实践去检验。(2)认识到认识具有反复性、无限性和上升性。要求我们要与时俱进,开拓创新,在实践中不断认识...