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【单选题】
听力原文：W: You are too careful. I can hardly put up with a car moving at this speed. M: Once bitten, twice shy. I was involved in a bead-on collision a few months ago. I don't want to repeat it. Q: What can we learn from the conversation? (14)A.
The man doesn't want to repeat what he Mid.
B.
The man has learned a lesson from his car accident.
C.
The man is shy, so he can't drive fast.
D.
The woman can't tolerate the man's attitude.
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【简答题】用放大镜观察一个30°的角，角变大了．______．
【单选题】对产品安全性要求由高到低依次排列为( )
A.
绿色食品、有机食品、无公害农产品
B.
有机食品 、 绿色食品 、 无公害农产品
C.
绿色食品、无公害农产品、有机食品
D.
公害农产品、有机食品、绿色食品
【简答题】（1）用10倍放大镜看30°的角，你观察到的角是______． （2）用10倍放大镜看50°的角，60°的角，你观察到的角是______，______． （3）由（1），（2），你得到的结论是______．