建构主义学习观认为，知识并还是对现实的准确表现，只是一种解释或假设，具有（）性。
参考答案：情境
用括号内所给单词的适当形式填空。
1. A reporter announced that all the spaghetti across the country had been________ (buy).
2. I'm sorry I_____ (break) your window just now and here's the money.
3. They had______ (flee) from the building when the earthquake took place.
4. It was such an________ (embarrass) moment that they didn't know what to say.
5. We__________ (learn) three thousand English words by the end of last term.
假如此检查阴性，还应做哪项检查
A．脑电图B．肌电图C．胸透D．依酚氯铵试验E．以上都不对
