题目

下图是测定植物某一生命活动过程的装置，从左侧泵入空气后，会产生某些实验现象，下列几种说法中错误的是A．该实验的目的是测定植物呼吸作用能产生CO2  B．本实验装置中B瓶的作用是减少实验误差  C．如果将C瓶中的植物换成萌发的种子，则出现相同的实验现象  D．把不透光的玻璃罩换作透光的玻璃罩仍能得到同样的实验结果 根据下面句子的意思及所给的汉语提示，写出空缺处单词的正确形式。1. How beautifully she sings! I've never heard a better    _____    (嗓音).2. She is ________ (结婚的), so we can call her Mrs. Smith. 3. We are in the same class. We are ________ (同班同学). 4. Will you ________ (邀请) some friends for dinner? 5. Don't be ________ (紧张的). It's very easy. 6. She likes singing. She wants to be a ________ (歌手). 7. Every teacher has a _________ (不同的) classroom. 8. She lives here with her ________ (父母亲). 9. Mary likes playing ________ (钢琴) very much.