单项选择题

What is the main idea of this passage

A．More people are dying from skin cancer.
B．A new health campaign is coming up.
C．Sunshine has a lot of benefits.
D．People should spend less time in the sun.

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单项选择题

The word such in Paragraph 2 refers to ______.

A．spin-offs from space research
B．research in hospitals
C．research in doctors offices
D．handicapped people

单项选择题

The article mainly discusses ______.

A．devices that enable astronauts to control their spacecraft
B．the value of the systems approach
C．practical applications of space research
D．ways of monitoring patients