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问题
选择题
人体内既是食物的通道又是呼吸的通道的器官是[ ]
A.口腔
B.咽
C.喉
D.鼻腔
答案
答案:
B
单项选择题
他事先没有充分调查研究,()得出了错误的结论。
A.以至
B.以致
C.甚至
D.直至
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选择题
—I'm afraid the meeting has begun.
—Don't worry. It _______ until the bell ________.
A. doesn't begin / rings
B. won't begin / will ring
C. won't begin / rings
D. doesn't begin / will ring
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