问题
单项选择题
直燃式溴化锂冷热水机组烟囱安装，烟囱采用钢制时，其钢板厚度应该大于或等于（）mm为宜。
A、1
B、2
C、3
D、4
答案
参考答案：D
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直燃式溴化锂冷热水机组烟囱安装，烟囱采用钢制时，其钢板厚度应该大于或等于（）mm为宜。
A、1
B、2
C、3
D、4
参考答案：D
| 阅读理解。 | ||||||||||||
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