单项选择题

In scope and difficulty, the canals construction was most closely alike to that of the （）

A．Suez Canal
B．trans-Siberian Railroad
C．Taj Mahal
D．pyramids of Egypt

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单项选择题

The canal was built with the help of （）

A．the airplane
B．the automobile
C．both the plane and the automobile
D．neither the plane nor the automobile

单项选择题

Which of these statements is true （）

A．About half of Panama lies east of Miami.
B．Panama is squeezed into the narrowest portion of Central America.
C．Panama offers the lowest point in the North American continental divide.
D．All of the above are tru