The original place of residence of African blacks is () A, Midwest, Southwest B, Northeast C and Southeast D, which is easy to answer. ! !

1. The original settlements of African blacks are mainly distributed in basins and plateaus in central and southwestern China. The climate is mainly tropical grassland, which is often threatened by floods and droughts.

2. The topography of Africa is dominated by plateaus:

There are immigrants in this area: Arabs, Indians, China, Southeast Asians, etc. from Europe and the Middle East. So Indians are not included.

4. Climate types in sub-Saharan Africa: there are tropical rain forest climate, tropical grassland climate and tropical desert climate, with tropical climate as the main climate. Characteristics of climate distribution in sub-Saharan Africa: with the equator as the center and symmetrical distribution in the northern and southern hemispheres.

Under different climatic conditions, the natural landscape is different: the landscape of tropical rain forest, tropical grassland and tropical desert. From the landscape map, we can observe the local climate characteristics: tropical rain forest climate, hot and rainy all year round, so the vegetation is lush; The climate of tropical grassland is divided into obvious dry season and rainy season, so grass flourishes in rainy season, withers in dry season and there are many wild animals. Tropical desert climate, hot and dry all the year round, nothing grows, and deserts are widely distributed.

The savanna can be said to be very hot all year round. There is relatively more precipitation in July, August and September, and relatively less in June 5438+0-April, June 5438+0 1 and June 5438+February. The tropical grassland climate is divided into obvious dry season and rainy season. In the rainy season, the weather is favorable, plants flourish, farmers have a good harvest and live a good life. In the dry season, there is little water and rain, plants are yellow, farmers' harvest is not good, and life is difficult to maintain. Therefore, savanna is threatened by floods and droughts.