Test and analysis: (1) As can be seen from the left figure, Nigeria's crude oil exports account for about 90% of its total export commodities. (2) According to the analysis on the left, the economic characteristics of this region are mainly exporting primary products, that is, a single commodity economy; The foreign trade cooperation between this region and China is highly complementary. Combined with the needs of China's economic development, this complementarity is reflected in the fact that China's economic development needs a lot of natural resources, while Africa is rich in resources; Africa's economic development lacks funds and technology, and China has the ability to provide financial and technical help; (3) The picture on the right shows that the problems in Africa are caused by the rapid population growth in Africa, so the measures taken mainly include controlling the population growth rate, improving the production level of agriculture and animal husbandry, accelerating economic development, and strengthening national unity and cooperation.
Comments: This question can also examine the location range of sub-Saharan Africa ① Hemisphere location: the eastern hemisphere, spanning the northern and southern hemispheres. ② Latitude position: mostly located between 250 N and 350 S, mostly located in the tropics. ③ Location of land and sea: it faces the Atlantic Ocean in the west and the Indian Ocean in the east. Topographic features: Plateau is the main terrain, and the terrain inclines from southeast to northwest. Sahara desert, the largest desert in the world; The longest river in the world-the Nile; Congo basin, the largest basin in the world; Congo River, the river with the richest water energy in the world; The longest strait in the world-mozambique channel; Lake Victoria, the largest lake in Africa; Lake Tanganyika, the deepest lake in Africa; The Gulf of Guinea, the largest bay in Africa; Madagascar, the largest island in Africa; Kilimanjaro, the highest mountain in Africa; Main climate types: Africa's climate is symmetrically distributed in the north and south with the equator as the axis, Congo Basin is the main tropical rain forest climate, and there are the world's largest savanna climate zones on both sides of the tropical rain forest; From south to north, there are tropical desert climate and narrow Mediterranean climate in turn; Mount Kilimanjaro in the east has a plateau and mountainous climate, and the top of the mountain is covered with snow all year round, which is known as the tropical "snowfield". This area is dominated by tropical climate and has high temperature all the year round, so it is called "hot Africa" and "tropical continent". Rivers: Niger River, Nile River, Zambezi River and Congo River; Black people in the world are mainly distributed in Africa; More than 90% of African blacks are in sub-Saharan Africa. Therefore, sub-Saharan Africa is also called "black Africa"; Single commodity economy: (1) Due to long-term colonial rule and control, most countries in this region mainly export one or two tropical cash crops and mineral products. (2) Solution: African countries are striving to develop national industries, and some countries are committed to developing diversified agriculture to change the situation that their economies rely on a single product. Population, food and environment: the main problems in this regard are population, food and environment.