根据下列I/O表和主回路图纸画星三角切换梯形图。
参考答案：
“先缴券，后划款”的具体含义是什么？
We speak a lot of English ________ in class ________ outside class. [ ]
A. both; and
B. both; as well as
C. as well; and
D. as well; as well as
