问题
单项选择题
铸造时石膏类包埋材料的加热温度必须在
A．500℃以下
B．600℃以下
C．700℃2以下
D．1 000℃以下
E．1 200℃以下
答案
参考答案：C
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铸造时石膏类包埋材料的加热温度必须在
A．500℃以下
B．600℃以下
C．700℃2以下
D．1 000℃以下
E．1 200℃以下
参考答案：C
The story happened years ago，when my daughter was still little. I was driving across the country with my daughter to 1 my husband. Since I intended to get to my destination before supper time, I drove 2 for a long time without a stop. Then after driving for many miles, I became tired and needed to stop for a break to get 3 . I found a rest area. It was mostly deserted, in a quiet area of the highway. I parked the car and carried my 4 into the restroom. When I came out I saw a middle-aged 5 wandering around. Feeling 6 about that, I asked the lady. What 7 me was: they were waiting for us! The lady told me that she and her husband wanted to see us safely back into our 8 . She explained that sometimes rest areas could be a 9 place for a young lady like me. She told me that she had a daughter almost my age, so they wanted to make sure that I got safely back on my way. I was very touched by their 10 . Being young, and probably naive to the potential 11 of rest areas, it had never occurred to me that there was any possibility of something going wrong. I 12 them for their kindness. My daughter and I continued our journey and 13 our destination safely. I never got their names but years have passed and their kindness is still not 14 . Sometimes angels come in make-up and just because you can’t see their 15 it doesn’t mean they aren’t angels.
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