根据现行海关规定，下列进口货物不属于海关减免税优惠范围的是( )。

A．残疾人单位或组织进口的货物
B．保税区内自用的生产设施
C．沿海经济开放地区基建项目所需进口机械
D．边民互市和国境小额贸易进口货物

A steady decline in annual movie-ticket sales is about to begin. More than half of the tickets sold last year were sold to the age group under twenty-five years of age, representing twenty-seven percent of the population. However, the number of individuals under twenty-five will steadily decline during the next decade.
Which of the following, if true, casts most doubt on the prediction above regarding future movie-ticket sales

A．Medical advances have lowered the mortality rates for those who are forty to sixty years of age.

B．Many people gradually lose interest in going to the movies after they reach twenty-five years of age.

C．The number of movie theaters has been increasing, and this trend is expected to continue during the next ten years.

D．Movie-ticket sales tend to increase as the size of the work force increases, and the size of the work force will increase annually during the next decade.

E．(E) Experts agree that people under twenty-five years of age will continue to account for more than half of the total number of tickets sold in each of the next ten years.