选用油漆牌号时，要特别注意樟丹或氧化铁红防锈底漆不能用于镀锌钢板。( )
参考答案：对
--- How many students are there in the classroom?
--- ______．All of them are practicing _____ the new song in the music hall．
A．Nobody; singing
B．None; singing
C．Twenty; to sing
D．No one; to sing
下列不属于面青临床意义的是（）。
A.痛症
B.寒证
C.血瘀
D.痰饮
E.惊风
