题干

在工业炼铁中,石灰石发生的化学原理是:CaCO3+SiO2 __ X+CO2↑,其中X的化学式是(   )

A:CaSiO4

B:Ca2SiO3

C:CaSi2O3

D:CaSiO3

上一题 下一题 0.0难度 选择题 更新时间:2012-05-25 05:50:08

答案(点此获取答案解析)

D

同类题5

阅读理解

The CLF Art Cafe, Peckham

    Playing different kinds of music, it has a night to serve most tastes. As one of the leading places for the creative arts, the building is full of friendly but crazy students and young people devoted to having a good time. But for those who aren't interested in making the ceiling sweat, there is an open-air rooftop, monthly plays and regular showings of films.

    Roxy, Fitzrovia

    In the heart of London's shopping center lies one of the flagships for a student night out in London. After showing their Student IDs, students head down into the basement (地下室) of the Roxy where they are thrown into a group of young people from all backgrounds and countries. Whether for a few drinks and a chat or a dance along to the sound of the latest hits, the Roxy's half-priced cocktail (鸡尾酒) will make sure you are satisfied.

    Bar Kick, Shoreditch

    For students who are very busy and have forgotten how to relax, keep yourself focused while you play a game of table football. Put yourself into the crowd of bars and clubs Shoreditch has to offer, Bar Kick presents students with a quiet evening. At street level, it seems like any other bar. Heading downstairs you'll find almost a dozen football tables replacing the dance floor, giving it a competitive edge to an evening away from school work.

    The Court, Tottenham Court Road

    For an affordable meal and drinks on a Sunday before a week of stress, head over to The Court. Combining the perfect combination of traditional pub comforts with student prices, the central London pub offers a quiet place as you catch up with classmates and forget about the stresses of being a student,