先有哈佛，后有美利坚合众国，这说明了哈佛在美国历史上的地位。( )

A. The fact that Harvard was founded before the United States of America testifies to its position in the American history.
B. Harvard was founded at first, then was the United States of America. This proves that Harvard is quite important in the United States' history.
C. The fact that the United States of America was founded before Harvard testifies to its position in the American history.
D. The United States of America was founded at first, then was Harvard. This proves that Harvard is quite important in the United States' history.

立体交叉处这个标志提示什么？（）

A．向右转弯

B．直行和左转弯

C．直行和右转弯

D．在桥下掉头