单项选择题

What is the name of the area which lies between the Rocky Mountains and the Appalachians

[A] The Great lakes.
[B] The Central Plain.
[C] The Grand Cannon.
[D] The Grand Plain.

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单项选择题

Armstrong suggests all the following preparations EXCEPT

A．looking at the mirror.
B．] practicing simulated interviews.
C．practicing answering questions.
D．finding some of your strong points.

单项选择题

Wijngaarden will further focus his research on whether

A．there is a definite relationship between high levels of lead and death.
B．the patients with brain tumors have higher levels of lead in their bones.
C．some workers have higher risks of developing brain cancers than others.
D．higher levels of lead have a long-term effect on children over a lifetime.

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