《守护甜心》里的守护甜心小兰是以什么颜色为主的？
参考答案：绿色
I felt it hard to keep up with my classmates. But whenever I want to ____________, my teacher always encourages me to work harder.
A．go on
B．give up
C．run away
D．give back
纤芯中沿r方向的场分布遵循（）规律。
A.正弦
B.贝塞尔函数
C.指数
