题干

下列关于物质性质及用途的叙述中,正确的是

A:铜在潮湿的空气里很稳定不会被锈蚀

B:二氧化硅可用来制造现代通迅材料光导纤维

C:N2是大气中的主要成分之一,雷雨时,可直接转化为NO2

D:硅是应用广泛的半导体材料,常温下只与F2、HF反应不和其它任何物质反应

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答案(点此获取答案解析)

B

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    The Van Gogh Museum in Amsterdam has welcomed home two paintings by the Dutch master, more than 14 years after they were ripped (抢) off the museum's wall in a nighttime theft. Museum director Axel Rueger called their return “one of the most special days in the history of the museum.”

    The paintings were discovered last year by Italian police while they were searching suspected Italian criminals' farmhouse near Naples for evidence of drug dealing. The two paintings were wrapped in cotton sheets. They were stuffed in a box and hidden behind a wall in a toilet when they were found.

    The paintings were considered among the artworks most searched for in the world. After years in darkness, they can now shine again. They are back on display at the museum before being taken to the conservation studio for repair. Fortunately, they suffered remarkably little damage as thieves who had climbed up a ladder and broken a window to get into the museum in 2004 rip them out of their frames.

    “It is not only a surprise that the works have been recovered but it's even more surprising they are in relatively unharmed condition,” Rueger said.

    The museum director was on vacation when the call came last year from Italian authorities who believed they had recovered the paintings. He didn't celebrate right away. He'd had calls like this before.

    “I was hopeful but also a little hesitant. Over these years, we had so many occasions when people phoned us, contacted us, claiming that they knew something about the whereabouts (下落) of the works and each time it was false, the trace went cold,” he said. “So...the way has been till of disappointment.” But museum experts sent to Italy to check the authenticity(真实性) of the works quickly turned Rueger's doubts into delight.

    Rueger said the paintings are now back permanently at the museum, which is home to dozens of works by Van Gogh. “I'm very confident that everything is safe in the museum from now on,” he said.