珠江流域除了西江上游的红水河段外，西江干流从上游到下游的粒径变化、CI

Except for the Hongshui section of the upper reaches of the Xijiang River in the Pearl River Basin, the particle size changes, CIA, and REE of the main stream of the Xijiang River from the upstream to the downstream all show obvious gradual changes. The overall CIA increases continuously from the upstream to the downstream. The CIA of the upper reaches of the Hongshui River is in the range of moderate weathering, and the downstream fine-grained sediments have experienced stronger chemical weathering than the upstream

Little is known about the extent to which interaction between teachers and students outside social media is influenced (e.g., the social atmosphere in the classroom, the status of teachers, and the relationship between teachers and students). ...

In the Pearl River Basin, except for the Hongshui reach of the upper reaches of the Xijiang River, the grain size change, CIA and REE of the main stream of the Xijiang River from the upper reaches to the lower reaches all show obvious gradual changes, and the overall CIA is increasing from the upper reaches to the lower reaches. The CIA in the upper reaches of Hongshui River is in the range of moderate weathering, and the fine-grained sediments in the lower reaches have experienced stronger chemical weathering than those in the upper reaches