外界寒冷、干燥并混有灰尘和细菌的空气，通过鼻腔后变成温暖、湿润、清洁的空气，鼻腔与之相适应的结构特点是

①鼻毛②鼻腔黏膜③鼻腔黏膜内的嗅细胞④鼻腔黏膜中的毛细血管网⑤鼻泪管 [ ]

A．①②③    

B．①③⑤  

C．①④⑤    

D．①②④

According to CFA Institute Standards of Professional Conduct, which of the following statements about material nonpublic information is FALSE Information is:（）

A. nonpublic until it has been disseminated to a select group of investors.

B. nonpublic until it has been disseminated to the marketplace in general.

C. material if its disclosure would be likely to have an impact on the price of a security.