问题
多项选择题
碳二加氢反应器出口乙炔不合格的原因可能有（）。
A．冷箱压力波动
B．系统负荷波动
C．氢气干燥器切换
D．氢气干燥器备用时未进行实气置换
答案
参考答案：A, B, C, D
搜题请搜索小程序“爱下问搜题”
碳二加氢反应器出口乙炔不合格的原因可能有（）。
A．冷箱压力波动
B．系统负荷波动
C．氢气干燥器切换
D．氢气干燥器备用时未进行实气置换
参考答案：A, B, C, D
| 从方框中选择最佳选项完成对话，有两项多余。 | |
W: I'm doing my homework, Dad. M: Doing your homework? You don't usually have any homework. W: Yeah. But we have a new teacher this week. M: A new teacher? 2_____ W: He is tall and he has short straight hair. M: Does he teach you English? W: 3_____ He teaches us math. He is a good teacher. M: 4_____ W: Yes. He is also very strict with us. M: Is there much homework today? W: 5_____ I can finish (完成) it soon. |