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第1题

、/p/, /b/, /m/ and /w/ are produced with the help of () . A . the upper teeth and inner lower lip B . the tip of the t
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第2题

The soft palate is also called () A . velum B . uvula C . trachea D . epiglottis
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第3题

3.多层聚乙烯膜的优点（ )(2 分) A.强度高 B.价格高 C.韧性低 D.透光率差
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第4题

Stress is being used in a more general way. lt refers to the syllable that receives lexicastress. () , on the other hand
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