有些人发生晕车、晕船和晕飞机现象,与此有关的结构是( ) A.鼓膜和外耳道 B.中耳和前庭 C.内耳和耳蜗 D.前庭和半规管 答案:D
用方框内的词填空。
they, she, he, it, those These, that's①— Is this Bob? — No, _____ isn't. ②This is Linda and _____ Jenny. ③— Are these your parents? — No, _____ aren't.④— Is Guo Peng your brother? — Yes, _____ is. ⑤— Is she your sister? — No, _____ isn't. She is my friend⑥ _____ are his brothers. ⑦— What are ______ over there? — They're computers.