班组（）对安全工器具全面检查一次，并对检查做好记录
参考答案：每月
— May we leave the classroom now — No, you ______. You ______ to leave until the bell rings.
A. needn’t ; are allowedB. don’t have to; are supposedC. mustn’t ; aren’t allowedD. can’t ; aren’t supposed
肿瘤最常见的转移部位为（）
A．肺
B． * *
C．盆腔
D．肝
E．脑
