技术人员不能涉足未经培训或考核的工作，只能做规定的化验，并根据化验结果提供信息。
正确
暂无解析
Hesaidthathe____(feed)upwithcollegeinstructorswhotriedtoteachhimtousethe“scientific
ltisoursincerehopethatyouwilldirectyourefforts__thepromotionofthisnewproductinyourmarket__ourmutualbenefit.
Iappreciate________(give)theopportunitytostudyabroadthreeyearsago.
Everyoneisexcitedbythenews,________________?
Theword“minister”originallymeant“aservant”,butnowhaschangedto“aheadofaministry”.Thisprocessofmeaningchangeiscalled______.