题目内容

His_______argument against our proposal is based on misinformation,

A.organic
B.valid
C.formal
D.principal

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万用表置欧姆挡时,()表笔连接表内电池正极。

After a short holiday, he_______ himself once more to his studies.

A.applied
B.engaged
C.managed
D.conducted

万用表置欧姆挡时,()表笔连接表内电池负极。

Depression, unexplained fear and unreasonable actions are the_______of a patient with mental health problems.

A.marks
B.systems
C.symbols
D.symptoms

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