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- How do gas fireplaces vent? 燃气壁炉是如何通风的?
- How often do I have to clean the gas fireplace and vent? 我应该多久清理一次我的燃气壁炉和通气系统?
- What are some of the theories to explain how does gas get exchanged during High Frequency Ventilation? 解释高频通气的气体交换原理的理论有哪些?
- How do you get start in that line of work? 你是怎么开始干那一行的？
- How do you explain this strange turn of events? 事情出现这种异常变化，你作何解释？
- How do you react to this modern artist's paintings? 你对这位现代艺术家的画有何评价？
- How do you steal a kiss from a girl like that? 你怎么赢得像那样了不起的女孩的吻的？
- How do they manage to subsist on such a low wage? 他们这点工资怎么糊口？
- How do I vent the MSD when my Personal Computer is not available? 当计算机与仪器连接故障时，如何关闭质谱?
- How do I know what to do and what not to do? 我怎么知道什么该做，什么不该做？
- How do people make a living in the steppe? 生活在没有树木的大草原上的人们怎样谋生呢？
- How do you go there, by bike or by bus? 你怎么去那儿的？骑自行车去还是乘公共汽车去？
- How do you have the brass to say that? 你怎么有脸那么说呢？
- How do you make this machine work? 你是怎么使这机器运转的？
- How do you cope with the problem of poor vision? 怎样解决视力不好这一难题呢?
- How do you feel about work with Martin? 与Martin合作感觉如何？
- How do you come by that scratch on your cheek? 你脸上的抓伤是怎么来的？
- How do you measure the volume of a gas? 你如何计量气体的体积?
- How do you manage to do such a thing? 你是怎么设法做这样的事?
- How do things stand at the moment? 目前实际情况如何？
