雨天避免“水滑”现象的有效方法就是保持高速行驶。
参考答案：错
Go about your business your own way. Don't _____what others think or say. [ ]
A. care for
B. care about
C. care with
D. care of
证券市场线方程式的内容是：E（rP）=rF+[E（rM）-rF]βP。（）。
