水压试验时，当压力达到试验压力后，要恒压一定时间，根据不同技术要求，一般为30～60min，观察是否有落压现象。（）
参考答案：错
根据句意和汉语注释，在横线上，写出单词的正确形式。
1. As we know, oil always __________ (漂浮) on water.
2. He __________ (点头) to me in greeting when I entered the room.
3. We are very __________ (自豪) that a pupil from our school has won the prize.
4. They all hurried __________ (往楼上) to see what was going on.
5. There was __________ (沉默) for a moment and then someone made a useful suggestion.
下列各项中，投保人不可以将其作为被保险人进行投保的是( )。
A．子女
B．配偶
C．与其有抚养关系的近亲属
D．相处很好的邻居
