氯丁胶混炼时,要先加氧化锌以防止焦烧,最后加氧化镁。
参考答案:错
单词拼写
1. The Taiwan S____ separates Taiwan Island from the mainland.
2. Now in China, an increasing P___ of the population have their own cars.
3. As the wage was low, few people a ____ for the position.
4. That accident o ____ at midnight.
5. My lather h ______ three men to help him with the harvest lastsummer.
6. Only a few of them thought highly of the plan. The m didn't agree to it.
7. He is an o ____ looking man.
8. ____( 显然) ,he has lost interest in physics.
9. The government announced additional rules on _____ ( 移民 ).
10. It is_____( 相信)that before long there will be more trees
以下等高线地形图中表示山脊的是
A、①
B、②
C、③
D、④