Unit 3 A healthy life 单元测试A卷-2021-2022学年高二英语人教新课标选修六

选修六 Unit 3 A healthy life 单元测试A卷 一、阅读理解 A     It's difficult to know the exact answer to whether babies dream and what they dream about. However, sleep experts have shown that newborns dream the most in the first two weeks after birth. Babies spend most of their sleeping time in the REM (rapid eye movement) stage. As dreaming takes place in a light state of sleep, newborns tend to wake up due to noises, movements and other factors. When dreaming, newborns make a few noises and their eyes move. Their eyes may move around the sides or up and down. They may laugh, scream, or cry during the REM sleep. Also, their facial muscles, hands, and legs move, due to which they may wake up. So wrapping a baby in swaddling (裹紧的)clothes can keep the baby's body from moving and help him sleep better. As babies grow, their body movements decrease when dreaming.     Studies say that the brain activity associated with dreaming is essential for the babies' mental development. During the REM stage, the flo