()是高强度气体放电光源中显色性最好的光源。
A.荧光灯;
B.金属卤化物灯;
C.高压钠灯;
D.高压汞灯
参考答案:B
极易引起走黄的疔疮是()
A.手部疔疮
B.足部疗疮
C.颜面部疔疮
D.红丝疔
E.蛀节疔
Football is one of _________ in China. [ ]
A. more popular sport
B. the most popular sport
C. more popular sports
D. the most popular sports