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A．Scotland.
B．Spain.
C．Swiss.
D．Switzerland.
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单项选择题Ph. D. s are most likely to___________.

A．have difficulties getting properly employed
B．be employed in the fields of commerce or industry
C．have to fill out application forms month after month for others
D．work in schools or colleges with low pay

单项选择题If we continue to consume energy at the present rate, by the end of the century, we shall have used energy _________.

A．6 times as much as the early industrial men
B．27 times as much as the agricultural ancestor
C．3 times as much as the modern men
D．9 times as much as the agricultural men