题目内容
6．听第10段材料，回答第18至20题．18．How often is the lab class given？
A．Once a week．
B．Twice a week．
C．Three times a week．
19．What is the result if one misses 3 lab classes？
A．He can't graduate．
B．He will get a low mark．
C．He will be dropped．
20．What is forbidden in the lab？
A．Washing hands．
B．Wearing short hair．
C．Wearing large clothes．
分析 略
解答 BCC
点评 略
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