单项选择题

Which of the following is true

A．Mars is larger than the Earth.
B．Mars had Viking as its moon.
C．Martian soil is brownish rod.
D．It takes longer for Mars to circle the Sun than it takes the Eart

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单项选择题

Mars has been nicknamed ______.

A．Viking I
B．Deimos
C．the Red Planet
D．Martian

单项选择题

According to David Tebbutt, the-purpose of Computertown UK is to

A．train people to understand how computers work
B．make more computers available to people
C．enable more people to fix computers themselves
D．help people find out more about computers