问题
单项选择题
工件在改变物态的淬火介质的冷却过程中，（）阶段是冷却速度最大的阶段。
A．蒸汽膜
B．沸腾
C．对流
D．常温
答案
参考答案：B
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工件在改变物态的淬火介质的冷却过程中，（）阶段是冷却速度最大的阶段。
A．蒸汽膜
B．沸腾
C．对流
D．常温
参考答案：B
| 补全对话。 | |
Girl: 1. Boy: Midori? Who's that? Girl: 2. Boy: Oh, yeah! She's Japanese, isn't she? Girl: Yes, she was born in Osaka in 1971. 3. When she was fourteen, she toured the United States. I saw her play when I was eight. Boy: Wow, 4. Girl: Yes, I do. I play them all the time. How about you? Who do you admire? Boy: I admire my grandmother, Laura. Girl: 5. Boy: Well, she was born in Russia in 1932. She was an unusual girl because she started ice skating when she was four, and she became a skating champion when she was ten. |