声波可以传递______,声波也可以传递______.
声波可以传递信息,声波也可以传递能量,我们利用声音就是利用声音来传递信息和传递能量.
故答案为:信息;能量.
商品的二重性是指价值与交换价值。 ( )
阅读短文,判断正误。对的打“√”,错的打“×”。
On Sunday, I go to the park (公园). I'm sitting on a chair. I'm wearing a purple skirt and blue pants. There
is a girl under the tree. She's wearing a red dress. What is she doing? She is skipping.
( ) 1. I'm wearing a purple skirt and blue pants.
( ) 2. The girl is wearing a green dress.
( ) 3. The girl is skipping under the tree.