A-A+
What does the author say about straight horiz
问题详情
What does the author say about straight, horizontal bars painted across roads？
A．They are falling out of use in the United States.
B．They tend to be ignored by drivers in a short period of time.
C．They are applicable only on broad roads.
D．They cannot be applied successfully to traffic circles.
参考答案
正确答案：B
解析：文章讲到“Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half”，也就是说横的直线只能短时间内有效。因此只能选择B。
