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A. 声音是由物体振动产生的 B. 声音必须通过介质才能传播
C. 声波在玻璃罩中发生了反射 D. 声波在传播过程中能量逐渐减少 查看习题详情和答案>>
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A. 声音是由物体振动产生的 B. 声音必须通过介质才能传播
C. 声波在玻璃罩中发生了反射 D. 声波在传播过程中能量逐渐减少 查看习题详情和答案>>
书面表达
2005 年是冼星海诞辰 100 周年，你了解这位伟大的音乐家吗? 请根据提示写一篇 70 词左右的短文。
提示：1．1905 年出生于中国澳门，后来到巴黎学习；
2．在抗日战争期间(Anti-Japanese War),于 1939 年仅用 6 天就写成了著名的《黄河大合唱》；
3．这首歌描绘出中华民族到了世界最危难时刻。《黄河大合唱》60 多年来一直深受欢迎。
4．不幸的是，他于 1945 年去世，年仅 40 岁。他是一位伟大的古典音乐和传统音乐的作曲家，他被称为“人民音乐家”。
查看习题详情和答案>>根据所给提示，完成句型转换。每空一词，含缩略词。
１．There are some new students in our school this term．(改为否定句)
There _______ _______ new students in our school this term.
２．The students don’t have much time to play with their friends．(改为反义疑问句)
The students don’t have much time to play with their friends, ________ ________?
３．Maria and Jane have waited at the airport for two hours．(对划线部分提问)
________ _________ have Maria and Jane waited at the airport?
４．The questions are very easy．The children can understand them．(合并为一句)
The questions are _________ ________ for the children to understand．
５．(课改实验区考生做)
Jim left Chongqing 3 days ago because of his new work．(改为同义句)
Jim has ________ ________ from Chongqing for 3 days because of his new work．
(非课改实验区考生做)
The film began about 20 minutes ago．You are late．(改为同义句)
The film has ________ ________ for about 20 minutes．You are late．
查看习题详情和答案>>______ you usually ______ supper at six o'clock?
2.The students of our class are doing morning exercises now. (改为否定句)
The students of our class ________ __________ morning exercises now.
3. He will go to England next month. (改为反意疑问句)
He will go to England next month, _______ ________?
4. Forty people have visited the museum. (对画线部分提问)
_________ ____________ people have visited the museum?
5. (课改实验区考生做) Aunt Wang asked me to clean the room. (改为被动语态)
I _________ __________ to clean the room by Aunt Wang.
(非课改实验区考生做)
She used the knife to cut the fruit a moment ago.(改为被动语态)
The knife ________ ________ to cut the fruit by her a moment ago.