Among traditional residential buildings, which provinces and regions are most suitable for building flat-roof houses and inclined-roof houses? () A. Xinjiang and Jiangsu B. Tibet and Gansu C.

The construction of flat-roof houses and inclined-roof houses in traditional houses is mainly determined by local precipitation. If the local rainfall is abundant, it is generally built as a sloping roof house, which is convenient for roof drainage. If the local precipitation is scarce, you don't have to consider the drainage problem and build a flat-roofed house. Xinjiang in A is located in the northwest inland, with little precipitation, generally flat-roofed houses, while Jiangsu is located in the monsoon region, with abundant precipitation, and most houses are inclined-roofed houses; Tibet and Gansu in B are both in non-monsoon areas, with little precipitation and mainly flat-roofed houses; Among C, Chongqing is rich in precipitation, mostly inclined-roof houses, while Shanxi is mostly flat-roof houses with less precipitation; D Zhejiang is rich in precipitation, mostly inclined roof houses, while Shandong has less precipitation, mostly flat roof houses.

So choose: a.