使用正确的倾听方法才能抓住问题的实质,下列不属于正确的方法的是()
A.耐心
B.专心
C.细心
D.小心
参考答案:D
写出下列各句的一般疑问句形式。
1. I played football yesterday.
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2. She wanted to buy a gift for you.
3. She washed clothes at home.
4. They cooked noodles together last Sunday.
5. He missed his grandmother.
吸声材料各自的吸声原理和性能是什么?