非相干系统的频域综合存在的两个明显缺点？

Saturday Kids’ Club
Kids’ Club starts at 10:30 am, with creative activities , followed by the film at 11:00 am . For 3-13 year olds . There will be no Kids’ Club on 5 and 12 July .

Saturday 21 June MEET THE ROBINSONS 102 mins Saturday 28 June TREASURE PLANET 95 mins

Saturday 19 July TWO BROTHERS 104 mins Saturday 26 July MR BEAN’S HOLIDAY 89 mins

NOTE TO PARENTS : Parents may leave children over 8 alone in the cinema , but should know that cinema is not providing any offical child care .
小题1:The above is         .

A．a poster from a club	B．an advertisement for films
C．a note to parents	D．an introduction of a cinema

小题2:Which of the following is allowed to the cinema alone in the club ?

A．A 2 – year – old baby	B．A 19 – year – old student
C．A 30 – year – old parent	D．A 10 – year – old pupil

小题3:The longest film of the four is         .

A．MEET THE ROBINSONS	B．TWO BROTHERS
C．TREASURE PLANET	D．MR BEAN’S HOLIDAY