Further auxiliary chemicals include active charcoal and（）.-未来题库

Further auxiliary chemicals include active charcoal and（）.

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Further auxiliary chemicals include active charcoal and（）.

A.catalysts

B.cefradine

C.amoxicillin

D.sulfonamides

正确答案：catalysts

Tags:auxiliary chemicals charcoal

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1.Further auxiliary chemicals include active charcoal and（）.
2.A （） verb phrase is a main verb preceded by an auxiliary or auxiliaries and it may also contain modifiers.
3.The modal auxiliary will with subjects of all three persons are commonly used to express future events.
4.Modal auxiliary verbs, also called modals, have no indefinite form and inflection.