气焊有色金属时会产生()有毒气体。

A、氟化氢
B、锰
C、铅
D、锌
E、铁
F、硅
查看答案
正确答案:
答案解析:
上一题
你可能感兴趣的试题

Inordertosetupherresearchprogramme,Shonagot____.

A、advicefrompersonalfriendsinothercountries
B、helpfromstudentsinothercountries
C、informationfromhertutor'scontactsinothercountries

OneproblemwithostrichfarminginBritainis____.

A、theclimate
B、thecostoftransportingbirds
C、thepriceofostricheggs

Abusinessmeetingagendaisplan__abusinessmeeting.

A、to
B、was
C、for

What’sthemeaningofmoneyinthe5M().

A、salesgoals
B、competitionandclutter
C、majormediatypes
D、communicationimpact

Alargenumberofyoungpeoplecannotfindajobwhentheyleaveuniversity.Whatproblemswillyouthunemploymentcauseforindividualsandforsociety?Givesomemeasurestohelpreduceunemployment.

热门试题 更多>
相关题库更多>
电焊工
高级焊工
中级焊工
初级焊工
试卷库
试题库