题目内容

The term accent is used for less drastic difference which is restricted to variation in pronunciation.()

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既能与金属钠反应，又能与氢氧化钠反应，还能与碳酸钠反应的是

A. HCOOH
B. CH3OH
C. HCOOCH3
D. C6H5OH
E. CHCH

Language contains two subsystems: sounds and meanings.()

They would rather work than rest.()

When linguists write grammars or lexicographers compile dictionaries they must use metalanguage.()