在动手画形象转面时，可以先用（）确定鼻子的中心位置。
A、弧形横线
B、垂直竖线
C、水平横线
D、弧形竖线
参考答案：D
在三相正弦交流电路中，电源线有（）中接法。
A、2
B、3
C、4
D、5
---Millie，is there anything else you want to know about Yangzhou paper cutting?
---Yes，I am still wondering __________ .
A．how is the Yangzhou paper cutting made
B．when did the Yangzhou paper cutting start
C．how many paper cutting museums are there in Yangzhou now
D．if the students learn paper cutting at school
