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