题目

类比是一种有效的学习方法，通过归类和比较，有助于掌握新知识，提高学习效率。在类比过程中，既要找出共同之处，又要抓住不同之处。某同学对机械波和电磁波进行类比，总结出下列内容，其中不正确的是    （    ）        A. 机械波的频率、波长和波速三者满足的关系，对电磁波也适用        B. 机械波和电磁波都能产生干涉和衍射现象        C. 机械波的传播依赖于介质，而电磁波可以在真空中传播        D. 机械波既有横波又听一段对话，回答第1小题至4小题。1.What are they talking about? [     ]A.Lucy 's class B.Lucy 's study C.Lucy 's teacher 2.What did Mr. Zhang ask Lucy 's mother to drink? [     ]A.A cup of tea. B.A cup of coffee. C.A glass of milk.  3.Lucy often gets over 90 in every subject, doesn's she? [     ]A.Yes, she gets. B.No, she doesn't. C.Yes, she does. 4.Why is Lucy a little weak in maths? [     ]A.Because she was ill last week. B.Because she doesn't like maths at all. C.Because she can 't see the words on the blackboard clearly.