【单选题】We don't know ______ he will come or not. [ ]
【单选题】When we don’t know the different ways languages are used in different cultures,we___make serious mistakes.
【单选题】进行心脏按摩时 , 应用 ( ) 放在按压位置。
【简答题】It is interesting to visit another country, but there are sometimes problems when we don't know the very well. It may be to talk with the people there. We may not know how to use the telephone in the ...
【简答题】When we don ' t know the different ways languages are used in different cultures, _______we make serious mistakes. [A]shall [B]must [C]could [D]should
【单选题】In this new city, we everyone will meet the _____ when we don’t know what to do.
【单选题】推进器式旋阀器旋阀的推动力来自于________。