【简答题】认真阅读下面短文,并在表格内的空白处填上一个合适的单词,注意:每空一词。 The average human experiences a lot of dreams while they sleep at night. But what exactly do they mean? The following explanations deal with four most common dream...
【单选题】Energy Cycle(能量周期) Do you find getting up-in the morning so difficult that it is painful? This might be called laziness, but Dr.Kleitman has a new explanation.He has proved that everyone has a daily e...
【简答题】完形填空。 Helen 's favorite food is chocolate. Her parents and teacher often say that it's 1 for her teeth to eat too much chocolate. But she doesn't believe it. She often puts some chocolate in the milk ...