All of the following slow down the process of westward movement EXCEPT
A. resistance from the French and the Indians.
B. the fall line in the Virginia frontier.
C. the prohibition order by British government.
D. the California Gold Rush.
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浙江省放心消费示范单位中一般要求七天无理由退货的有放心商店、放心网店。()
Which of the following is cited as an expression of American pessimism？
America is no longer a mighty and good-hearted giant.
Bill O"Reilly and his like are popular among the public.
C. Americans consider their houses as pots of lead.
D. Most Americans think the Iraq war was not worth the fighting.
证券自营业务的风险有哪些，相应的防范措施是什么？请加以论述。
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