【单选题】This type of learning, however, is called conditioning. The animal simply learns that when it performs a particular behavior, it gets a reward, usually a fish. Many animals, including rats, birds, and...
【简答题】People like to look in the mirror often when they have a young and beautiful face. However, when one grows old, nobody wants to see their wrinkled old face in the mirror any more. So, many old people ...
【单选题】However, when ______teams to complete tasks at school, we are often hardly aware of this.
【简答题】When a dog bites a man, it usually doesn’t make news. However, this saying change when Beijing and several other Chinese cities announced the “Civilized Dog Raising” campaign in November. The governme...
【单选题】We met the young couple at a party three weeks ago. __________ we've had no further communication.
【单选题】However, executives may be discouraging consumption when they (10) those pricing practices.
【单选题】金波是中国当代著名儿童诗人,他在儿童诗的体式上进行了新的尝试,写成了( )。