为适应三相四线制供电要求，三相变压器的接线组别应为（）。
A、Y，d11
B、Y，y0
C、Y，yn0
D、D，d0
参考答案：C
Read and choose. (读句子，选择相应的图片)
1. Look at the rainbow in the sky (天空). [ ]
2. 一Do you like squirrels?
一Yes, I do. [ ]
3. We go to our school by taxi.[ ]
4. 一 Susan, can I have strawberries?
— Sorry?We don't have strawberries. [ ]
税款征收的方式有哪些？
