单项选择题

"Defied" in the 5th paragraph probably means （）

A．doubted
B．gave proof to
C．challenged
D．agreed to

<上一题目录下一题>

热门试题

单项选择题

It was （） that asked Maury for help in oceanographic studies.

A．the American Navy
B．some early intercontinental travellers
C．those who earned a living from the sea
D．the company which proposed to lay an undersea cable

单项选择题

A canal in Panama was first proposed in the（）

A．1, 300S
B．1, 500S
C．1, 600S
D．1,700S