—You don't seem to be quite yourself today. What's wrong?

—Oh, I'm suffering from a cold. Nothing serious,________

A．yet

B．indeed

C．though

D．anyway

关于比色的工作条件，下列各项叙述不正确的是（）

A.减少人员间色彩判别误差

B.环境以白色基调为好

C.在白色自然光或模拟日光光线照明最好

D.比色要快速扫视，不宜采取凝视

E.患者口腔与比色者的视线同高