喹诺酮类药物的作用机理是抑制了敏感细菌的()。

异替换系(名词解释)

未知题型异替换系(名词解释)

推车机、翻车机硐室或卸载硐室断面较大，一般在()之间，其下与煤仓相连。A、10~15m²B、15~20m²C、...

单项选择题推车机、翻车机硐室或卸载硐室断面较大，一般在()之间，其下与煤仓相连。

Jack is late again. It is ___ of him to keep others wai...

单项选择题Jack is late again. It is ___ of him to keep others waiting.