A. She went to see her mother immediately. B. She rang up her mother saying everything was OK. C. She sent her mother a short message of her safe arrival. D. She decided that she would never travel by air.
A. 类胡萝卜素 B. 叶绿素 C. 脱镁叶绿素 D. 氧化型色素
A. 25.4mm B. 133.4mm C. 124.4mm D. 23.4mm
A. 对 B. 错