what 引导疑问句时,它前面是可以连用介词的。如:
At what age did she retire? 她多少岁退休的?
In what way are these two stories the same? 这两部小说在哪方面相同?
At what frequency does the sound occur? 这声音多久响一次?
In what year was the car made? 这辆车是哪一年生产的?
但如果 what 引导的是感叹句呢?它前面也可以连用介词吗?若可以,请举出权威的例句;若不可以,请给出权威的理由或依据。谢谢!