【判断题】.经过修理虽可使用,但所花费在经济上不合算的废品,属于不可修复废品。
【单选题】________of being involved in the attempted murder, she was questioned by the police. [ ]
【单选题】_______ of being involved in the attempted murder, she was questioned by the police.
【简答题】Being engaged in the research work, Dr. Yang seldom goes anywhere _____ his office. A) in place of B) except to C) in addition to D) instead of
【多选题】对抛射剂叙述正确的是
C.
抛射剂是气雾剂的喷射动力,有时兼有药物溶剂作用
【单选题】下列关于抛射剂的叙述错误的是()。
E.
抛射剂应该为适宜的高沸点液体,常温下蒸汽压小于大气压