问题
单项选择题
链条炉的（）可以延长灰渣在炉排后部的停留时间。
A、前拱
B、后拱
C、煤闸门
D、老鹰铁
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
链条炉的（）可以延长灰渣在炉排后部的停留时间。
A、前拱
B、后拱
C、煤闸门
D、老鹰铁
参考答案：D
| 根据对话内容，从A—E五个选项选出能填入空白处的最佳答案，将其序号填在下面 空白处。 | |
| A: Can I help you? B: I'd like three air tickets to Beijing. A: 1_____ B: On June 30th. A: June 30th? Er, I'm sorry.But all the tickets for that day are sold out. 2_____. B: Let me think. Yes,that's OK. 3_____. A: The earliest flight will leave at seven o'clock in the morning. B: Does it stop anywhere? A: No. It will go straight to Beijing. B: 4_____ A: 5_____
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