题目内容
A guide should stand by the road to signal for help immediately when an accident happens.
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After the first Opium War in 1840, the Bund gradually became the British Concession and International Settlement.
The reception rooms of Shanghai & Hong Kong Bank were built with five architectural styles: the American, British, French, Russian and Greek styles.
Dongfeng Hotel was built in classic American style with a six-storey structure topped with two pavilions in the east and west.
杨氏双缝干涉干涉获得相干光的方法是分波阵面法。
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