Listen to a conversation and choose the best answer to each question you hear.[音频][音频][音频]
An airplane crash on the news.
B. An unusual flight the woman experienced.
C. A complicated holiday trip the woman took.
D. A severe earthquake they went through.
查看答案
[音频]
A. It crashed shortly after landing.
B. The wheels couldn’t come down.
C. All the engines stopped working.
D. It shook violently during landing.
[音频]
A. They were very scared.
B. They all tried to stay calm.
C. They prayed for their safety.
D. They comforted each other.
[音频]
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.
影响油脂色泽的因素包括（）。
A. 类胡萝卜素
B. 叶绿素
C. 脱镁叶绿素
D. 氧化型色素
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