东北平原主要的农作物是[ ]
A、冬小麦、大豆、棉花
B、春小麦、花生、甘蔗
C、春小麦、大豆、甜菜
D、冬小麦、谷子、甜菜
答案：C
When we are getting excited, angry or scared, our bodies also ______many physical changes.
A．go over
B．go around
C．go through
D．go far
基尔霍夫第一定律、基尔霍夫第二定律的内容是什么？
