1In economics and finance, nothing can be measured with the precision possible in the physical sciences. However, approximate measurement is often sufficient as long as the method of measurement remains the same over time. It is important for anyone who is considering buying stock in a company to know that the usual methods of accounting have been followed.
2Unfortunately, even when auditors certify that a company has prepared its financial reports properly, they cannot always be certain that all figures are 100 percent accurate. Because a company’s books are not open to public scrutiny, it is possible for a company to distort its financial status. Accounting scandals occur because of dishonesty, questionable accounting practices, or outright criminal behavior. Although the accounting profession and government agencies have attempted to reform some of these abuses, the principle of caveat emptor--let the buyer beware--must still guide one’s financial transactions.

Why does the author mention the principle of caveat emptor in paragraph 2

A．To recommend that the government review all stock purchases

B．To criticize inadequate efforts to stop bad accounting practices

C．To argue that buying stock is the best way to make money fast

D．To warn potential buyers of the possibility of accounting abuses

A．无菌

B．灭菌

C．消毒

D．防腐

E．除菌

片剂包糖衣时，滑石粉与70%糖浆用于（）

A.A

B.B

C.C

D.D

E.E