一个化合物如果能和茚三酮反应生成紫色，说明这个化合物是氨基酸、肽和蛋白质。 ( )
参考答案：错
《卜算子》：“零落成泥碾作尘，只有香如故。”的作者是（）。
Her sister （） a rich man. They （）for twenty years.
A. married with; have married
B. married to; have married
C. married; have been married
D. had married; have been married
