（）现车安装时没有方向要求。 ["缓解阀","金属软管","止回阀","远芯集尘器"]
Although the Wars of the Roses were fought intermittently for（）years,ordinary people were little affected and went about their business as usual. ["20","30","40","50"]
Ra在代号中仅用数量表示，单位为（）。 ["μm","cm","dm","nam"]
合成词
金融机构在班里业务时发现假币，由该金融机构（）业务人员当面予以收缴。 ["至少2名","至少3名","至少4名"]
单纯词
