/e/ generally appears at the beginning，in the middle of English words, but does not occur in final position.
A. 对
B. 错
/e/ is a short, half-open, rounded lax front vowel.
A. 对
B. 错
Before you listen, match the words with their Chinese translation.
以下因酶促作用使效力降低的药物是
A. 华法林
B. 双香豆素
C. 氨基比林
D. 氢化可的松
E. 洋地黄毒苷
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