题目

甲声音波形如图所示，把音调比甲低、响度比甲强的乙的声音输入同一设置的示波器，乙声音的波形是图中的哪一幅（） A . B . C . D . 答案：D阅读下面的短文，从方框所给的单词中选择合适的单词补全短文，毎空只填一词，每词只准用一次。 Today is Sunday. Aunt Li and Aunt Wu don’t go to __1__.They’re __2____ the park. Look, Aunt' Li is tall and 3__ , but Aunt Wu is taller and 4 than her. Now Aunt Li is 5__sports. She’s 6 But Aunt Wu is 7 , because she can’t __8 sports today, her arm__9___ She is sitting under thetree. She __10_____ bored.