【单选题】Ordinary woman though she is, she has won the award because she tries every means to make people _______ of the importance of the environment conservation. [ ]
【单选题】Mary has a curious expression on her face as though she ______ about something.
【判断题】选择培养基在成分中加入某种特殊化学物质能与目的菌的无色代谢产物发生显色反应的培养基。
【单选题】Though she has been in England for half a year, she is still unable to _____ in simple English. [ ]
D.
make herself understand
【多选题】反映建筑材料与水性质有关的指标是( )。
【多选题】关于建筑材料物理性质说法正确的有( )。
C.
材料抗冻等级反映了材料在自然干燥状态下抵抗冰冻破坏的能力
E.
材料孔隙率中的孔隙既指固体材料的内部孔隙,也指散状材料颗粒间的孔隙
【判断题】光纤激光器安装时要注意粉尘、油污等污染镜片