【单选题】Please______the safety seal has not been broken before using this product.
【单选题】Before using the machine, you must ____ carefully to these instructions.
【简答题】北京地铁车辆编号100861表示的含义为:10表示(),086表示,1表示()。
【简答题】居家隔离观察对象主要是哪些人?居家隔离观察时间是多久?
【单选题】People did not like using the subway before an organized group of graffiti artists came.
【单选题】下列各组词语中,错别字最多的一组是 ( )
A.
气冲宵汉 合盘托出 喜结连里 比冀双飞 大放阙词
B.
东施效鼙 九重城阙 姊妹弟兄 风姿绰约 面临诀择
C.
缓歌慢舞 闻名暇迩 歌声宛转 天生丽质 恣意谩骂
D.
搔痒难忍 秋后算帐 恃宠而娇 屡上荧屏 天上宫阕
【单选题】Before using penicillin, _________.
A.
The doctor should make a careful inquiry about sensitivity
B.
T he patient should be given a skin test
【单选题】Before using your new pressure cooker, read the following______ carefully.
【单选题】Before using the machine, you should read the ______carefully. [ ]
【单选题】Tourists have learnt to make investigations about tour operators before using them.