什么是鉴别良、恶性肿瘤的特异指标为()
A.非特异性酯酶含量测定
B.胞质抗原含量测定
C.DNA含量测定
D.过氧化物酶含量测定
E.DNA倍体含量测定
参考答案:E
安第斯山区有数十种蝙蝠以花蜜为食。其中,长舌蝠的舌长为体长的1.5倍。只有这种蝙蝠能从长筒花狭长的花冠筒底部取食花蜜,且为该植物的唯一传粉者。由此无法推断出
A.长舌有助于长舌蝠避开与其他蝙蝠的竞争
B.长筒花可以在没有长舌蝠的地方繁衍后代
C.长筒花狭长的花冠筒是自然选择的结果
D.长舌蝠和长筒花相互适应,共同(协同)进化
According to CFA Institute Standards of Professional Conduct, members must preserve the confidentiality of information received from a client unless:()
A. the information pertains to an impending tender offer.
B. the client has also provided the information to another member.
C. the member is aware of illegal activity by the client.