烃类发生了完全降解氧化反应的结果是()。
A、生成了H2、CH4等低分子物
B、生成了目的氧化产物
C、使反应转化率降低
D、降低了反应的选择性
参考答案:D
放射性核素显像检查诊断阳性率较高的是
A.肝肿瘤B.甲状腺肿瘤C.大肠癌D.骨肿瘤E.脑肿瘤
Only ticketholders were ________ to the stadium for the concert given by Jay Chou, so many of his fans were turned away.
A.allowed
B.permitted
C.agreed
D.admitted