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问题 解答题
已知关于x的函数f（x）=-
1
3
x3+bx2+cx+bc，如果函数f（x）在x=1处有极值-
4
3
，试确定b、c的值．
答案

f′（x）=-x2+2bx+c，

∵f（x）在x=1处有极值-

4
3

∴f（1）=-

1
3
+b+c+bc=-
4
3
，f'（1）=-1+2b+c=0

解得：b=1，c=-1或b=-1，c=3

多项选择题

从事证券经纪业务的证券经纪商与投资者签订证券买卖代理协议应包括的内容有( )。

A．证券经纪商向投资者揭示证券买卖的风险

B．委托、交收的方式、内容和要求

C．投资者应履行的交收责任

D．违约责任及免责条款
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单项选择题

A variety of illegal acts committed by people in the course of their employment, for their own personal gain, are collectively known as white-collar crime. Embezzlement, theft and trading securities (1) insider information are common forms of white-collar crime. The majority of cases involve low-level employees who steal because they are under (2) financial stress. Many plan to (3) the money back as soon as possible but may never do so. Their crimes are usually never (4) because the amounts of money are small, and no one notices the (5) .

(6) , there are some very large cases of white-collar crime, such as multimillion-dollar stock market or banking seams that take years to discover and are extremely difficult and expensive to (7) .

White-collar crime is not (8) to the business sector. Government employment, especially (9) the city level, also provides opportunities to (10) one’s pockets. (11) , building inspectors accept bribes and full-time employees receive (12) payments.

Although white-collar crime is less (13) than street crime, it involves (14) more money and harm to the public than crimes committed by street criminals. It is (15) that there are more criminals (16) the office suites than in the streets, yet the (17) of white-collar makes it difficult to uncover the offenses and pursue the offenders. As the economy (18) from manufacturing to services and electronic commerce, opportunities for white-collar crime (19) , while the technology needed to stop such crimes will (20) .

19（）

A.degenerate

B.upgrade

C.decrease

D.multiply
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