为加强铺架安全控制，在（）情况下要按规定暂停架梁作业。
参考答案：大雨及六级以上大风天气
The sunspot came into its active stage last year, that happens once every eleven years.
A．one
B．it
C．the one
D．what
防止锅炉燃烧低熔点煤种时结焦有哪些措施？
