国民经济各行业的增加值之和就是国民经济核算中的国内生产总值，即GDP。（）
参考答案：对
用所给词的适当形式填空。
1. I _________ (be) in Hangzhou last week.
2. He couldn't _________ (answer ) the question.
3. There _________ (be) some bread and two apples on the table, but where are they now?
4. He_________ (has) a bowl of porridge and went to work.
5. We _________ ( get) the news yesterday afternoon.
通过对直方图的形状分析可以判断，工序在稳定状态下就不会出现不合格品。
