用户对数控机床验收时,一般要求连续空运行()不出故障,表明可靠性达到一定水平。
A、8小时
B、24小时
C、96小时
D、一个月
参考答案:B
句型转换, 根据要求完成句子。
1. Can she go to the movies? (作否定回答)
________, ________. She's playing soccer.
2. I'm very busy tonight. I can't come to your party. (合并成一个简单句)
I'm ________ busy ________ come to your party.
3. Li Ming does eye exercises every day. (改为否定句)
Li Ming ________ ________ eye exercises every day.
4. They had fun yesterday. (改为同义句)
They_________ _________ __________ ________yesterday.
5. My glasses are broken. (对划线部分提问)
________ ________ with your glasses?
简述渐进式改革方式的特点。