小明患有夜盲症,小刚患有脚气病.他们缺乏的维生素分别是( )
A:维生素C,维生素A
B:维生素B1,维生素D
C:维生素A,维生素B1
D:维生素C,维生素D
They were smoking the teacher appeared in front of them.
小红参加数学口算比赛,结果做对了85题,做错了15题,小红这次口算的正确率是____.