设A和B为两事项件，0<P(A)<1，则下述结论中错误的是（　　

【名词&注释】

体育馆(gymnasium)、音乐节(festival)、做什么(do what)

[单选题]设A和B为两事项件，0<P(A)<1，则下述结论中错误的是（　　）

B.

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[单选题]What job will be done the day before the festival begins?

回答下面的题目Student Volunteers Needed!On Saturday, December 12th,from 10 A．M．until 4 P． M． , Carverton Middle School will be holding a music festival in the school gymnasium． The special event will feature a variety ofprofessional musicians and singers．TaskTimeDateMake posters1 P．M．一4 P．M．December 5thSet up gym11 A．M．一4 P．M．December 1thHelp performers9 A．M．一4 P．M．December 12thWelcome guests10 A．M．一2 P．M．December 12thClean up gym4 P．M．一7 P．M．December 12thInterested students should speak with Ms．Braxton,the music teacher．Students who would like to help at the festival must have written permission from a parent or guardian．What time will the festival begin?

A. Making posters．
B. Setting up the gym．
C. Cleaning up the gym．
D. Helping the performers．

[多选题]参于脑干组成的有 （　　）

A. 小脑
B. 问脑
C. 中脑
D. 脑桥
E. 延髓

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