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The boss was late for the meeting because his alarm clock didn't _____
10个月前
1年前
A 3G mobile phone, ______to be most useful and fashionable, is popular with some teenagers.
1年前
如图,矩形OABC的两边在坐标轴上,连接AC,抛物线y=x2-4x-2经过A,B两点. (1)求A点坐标及线段AB的长;
1年前
Last Friday a storm swept through two villages in the New Territories, destroying fourteen homes.
1年前