更多"What’s happening"的相关试题:
[单项选择]What’s happening
A. A revolutionary NASA jet was destroyed in its first flight.
B. A booster rocket veered out of control and tumlJled to the ground.
C. A booster rocket was destroyed after it fulfilled the task.
D. A revolutionary NASA jet was destroyed after many flights.
[单项选择]What’s the man’s attitude towards what’s happening
A. He’s unwilling to wait in line.
B. He’s satisfied with the purchase.
C. It’s worthwhile to queue for tickets.
D. He’s impatient with the ticket sellers.
[简答题]Knowing what is happening and what to do in a car emergency can save time, money, worry--even your life. (Passage Four)
[单项选择]
What’’s Happening While Sleeping
Sleep is very important to humans. The average person spends 220,000 hours of a lifetime sleeping. Until about thirty years ago, no one knew much about sleep. Then doctors and scientists began doing research in sleep laboratories. They have learned a great deal by studying people as they sleep, but there is still much they don’’t understand.
Scientists study the body characteristics that change during sleep, such as body temperature, brain waves, blood pressure, breathing, and heartbeat. They also study rapid eye movement (REM). These scientists have learned that there is a kind of sleep with REM and another kind with no rapid eye movement (NREM).
NREM is divided into three stages. In stage one, when you start to go to sleep, you have a pleasant floating feeling. A sudden noise can wake you up. In stage two, you sleep more deeply, and a noise will probably not wake you. In stage three, which you reach in less than
A. Y
B. N
C. NG