电离热小元素，只有在较高的温度下才能发生电离导电。
参考答案：错
选用is或are填空。
1. She _____ a bit shy.
2. These ____ my teachers.
3. He ____ very clever.
4. Parrot ____ a very naughty bird.
5. They ____ very naughty.
什么是锰硫比？为什么连铸钢水要规定一定的锰硫比？
