材料( )的好坏，与材料的孔隙率和孔隙特征有密切关系。
A．吸湿性
B．抗渗性
C．抗冻性
D．耐水性
参考答案：B
188. He found it dull to be kept in the same class with other students, for his English was _____ above the beginners’ level.
A．obvious rather
B．obvious much
C．obviously well
D．obviously fairly
纳税人进口应税消费品，应当自海关填发税款缴纳凭证的次日起7日内缴纳税款。( )
