单项选择题

A．The natural colors of astronomical objects can be captured.
B．The cost of equipment needed is reduced.
C．Fewer data need to be analyzed.
D．The images can be studied by different astronomers.
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单项选择题
A．Cold.B．Very hot.C．Drier than the weather on the day of this conversation.D．Cooler than the weather on the day of this conversation.
A．Cold.
B．Very hot.
C．Drier than the weather on the day of this conversation.
D．Cooler than the weather on the day of this conversation.
单项选择题
A．To look for a different lifestyle.B．To enjoy themselves.C．For adventure.D．For education.
A．To look for a different lifestyle.
B．To enjoy themselves.
C．For adventure.
D．For education.
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