【单选题】电容式传感器在极板间放置云母、塑料膜等介电常数高的物质的主要目的是( )。
【单选题】电容式传感器在极板间放置云母、塑料膜等介电常数高的物质的主要目的是()
【判断题】不论在什么介质中不锈钢的耐腐蚀性都好于碳钢
【单选题】As your textbook explains, visual aids are most effective when they are displayed __________.
B.
during the introduction of a speech
C.
on an easel where they are visible to everyone
D.
only while the speaker is discussing them
【单选题】In what way do women contribute to the small family size according to the text?
A.
By educating their children.
C.
By supporting the small family.
D.
By educating their husbands.
【判断题】不论在什么介质中不锈钢的耐腐蚀性都好于碳钢。
【判断题】不论在什么介质中不锈钢的耐腐蚀性能都好于碳钢。