搪瓷管道是含______高的瓷釉通过______的高温煅烧,使瓷釉紧密地附着在金属胎表面而制成的。
参考答案:硅量;900℃
选词填空。
1. Do you usually go to school bus? (on, by)
2. This is me my boots and umbrella on a rainy day. I am wet. (with, without)
3. Don't your boots and umbrella. (forget, to forget)
4. Steven always pants. (wears, wear)
5. Sometimes I ride bicycle. (my, mine)
说明主导动机与从属动机的区别。