【单选题】Not until he called the secretary three times ______ that the manager went to an important meetin
A.
33.Not until he called the secretary three times ______ that the manager went to an important meeting. A.did he tell
【判断题】对含有悬浮物质的溶液加热时,应加沸石或玻璃珠,以避免爆沸现象产生。
【单选题】下列选项中,正确表示我国汉字形体演变历史的是()。
【判断题】聚乙烯管道焊接作业人员必须取得质量技术监督部门颁发的特种设备作业人员证方可从事焊接工作。
【判断题】聚乙烯管道焊接作业人员必须取得质量技术监督部门颁发的特种设备作业人员证方可从事焊接工作。
【单选题】下列选项中,正确表示我国汉字形体演变历史的是()。
【单选题】Not until he called the secretary three times _________ that the manager went to an important meeting.