单项选择题

A．including
B．along
C．dealing
D．and
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单项选择题
A．noB．incomeC．indirectD．direct
A．no
B．income
C．indirect
D．direct
单项选择题
What will happen when there is more solar wind activity
A．Less carbon-14 is produced.
B．More carbon-14 is produced.
C．None carbon-14 is produced.
D．Nothing will happen.
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