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ab blood type
B.C.
BCD
(1) At the autumnal equinox, the equator (2) bisects the world day and night, and the height of the sun decreases from the equator to the north and south poles at noon.
(1) Figures (2)A and E, C(3) C, B (4) Subtropical high pressure, prevailing westerly wind (5) mild and humid all year round, controlled by prevailing westerly belt all year round.
(1) precipitation, water vapor transportation and evaporation (2) land and water resources (3) surface runoff (4) open source: South-to-North Water Transfer Project, reservoir construction, groundwater exploitation, seawater desalination and artificial precipitation enhancement. Throttle: save water and use more water? Wait a minute.
(1) Syncline, the internal force of fault (2) makes the rock stratum bend and deform, forming anticline mountain, and the top of anticline is eroded into valley by external force due to tension.