单项选择题 Although only in his twenties，he was already（）bal.

单项选择题 None of his arguments seemed to me to（）.

多项选择题 光气及光气化中，装置设有多套安全联锁系统，紧急停工是在事故状态时导致紧急泄压系统自动或手动触发。紧急停工的原则有：（）等。