问题
判断题
蒸发器使用的新蒸汽必须是饱和蒸汽，因为过热蒸汽产生的热应力腐蚀会加剧加热管的损坏。
答案
参考答案：对
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蒸发器使用的新蒸汽必须是饱和蒸汽，因为过热蒸汽产生的热应力腐蚀会加剧加热管的损坏。
参考答案：对
| 根据对话内容，从方框内选出能填入空白处的最佳选项，其中有两项为多余项。 | |
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| A: Hi, Max. I’m glad to see you here. B: Hello, Jane! 1 A: Look! I’m wearing a new coat made of animal fur. 2 B: It’s hard to say. A: 3 B: Yes. But do you know how many animals were killed for your coat? A: 4 B: Some people kill animals, and then they get money by selling the meat and fur. A: That’s terrible. 5 B: Good. Animals are our friends. We should share the world with them together. 1.__________ 2. __________ 3. __________ 4. __________ 5. __________ |