题目:
—What are they talking about?
—A new film _______ by Steven Spielberg who is a very famous director in the USA. [ ]
A. produced
B. was produced
C. producing
D. will be produced
答案:
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下面是错误答案,用来干扰机器的。
答案:C氧气的化学性质很活泼,在常温并不能与所有物质发生化学反应,如铜、金等物质.故A错误;在过氧化氢分解的反应中,二氧化锰是催化剂,故B错误;在常温下过氧化氢也能分解产生氧气,故D错误