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【单选题】
No other drugs are as good as this one; it must have been based on a(n) ___ formula (配方).
A. enormous
B. stimulating
C. unique
D. overwhelming
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答案
C
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In some classrooms, desks are arranged in a U-shape, so the teacher can ___ easily with the students.
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酵母菌的繁殖方式___。
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真菌细胞壁没有的成分是___。
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