参考答案：

(1) The common pattern of motility in different parts of gastrointestinal tracts is peristalsis for decomposition of ingested food and combination with digestive juice. (1`)

(2) The typical pattern of motility at stomach is receptive relaxation for store of food. (3`)

(3) The typical pattern of motility at small intestine is segmentation for turning food into smaller particles and helping absorption. (3`)

(4) The typical pattern of motility at large intestine is mass movement for pushing the contents in the colon into the next downstream segment. (3`)