全封闭组合电器的外壳应按制造厂规定接地，法兰片间应采用（）连接，并应保证良好电气通路。
参考答案：跨接线
根据汉语或首字母提示完成单词。
1. He is so （精疲力竭的）that he can do nothing now.
2. Could you (描述) our classroom in English?
3. If you're free, I'd like to I ____ you to dinner with my family.
4. There is nothing in the fridge. It's e .
5.I had learned a lot about planting from that knowledgeable f______．
以下疾病中属人畜共患病的是（）。
A．猪瘟
B.布氏菌病
C．法氏囊炎
