在安全与生产的关系上要坚持“三不生产”的原则是不安全不生产、（）和（）。
参考答案：隐患不处理不生产、措施不落实不生产
单词分类。
A. frustrating B. do more exercises C. listening to tapes D. excited
E. boring F. asking questions G. bored H. watch movies
I. frustrated J. getting an English tutor
1. The game is so _____ that I can't stand it.
2. After having a Chinese class, I felt _____.
3. I'd like to learn English by _____.
4. Do you think learning by surfing the Internet is good or bad? Why?
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数控机床要求在（）进给运动下不爬行，有高的灵敏度。
A、停止
B、高速
C、低速
D、匀速
