单项选择题

The largest telescope in the world _________.

A．has recently been built in America
B．is 200 inches long
C．has shown millions of new stars to us
D．is the most powerful one at Mount Palomar in the U.S.

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热门试题

单项选择题

The best topic for the passage is _________ .

A．What Is a Telescope
B．The History of Telescopes
C．How a Telescope Works
D．How Far a Telescope Can Reach

单项选择题

With the help of telescopes, scientists can _________.

A．discover all stars and planets in the universe
B．gain more knowledge about the universe
C．study the craters, mountains and plains on the moon's surface
D．increase our knowledge of the earth