【简答题】Select 10 words or phrases from the learning materials including in today's lesson, look them up in the Baidu online dictionary and write down their meanings with example sentences.
【单选题】当圆水准器气泡居中时,圆水准器轴处于( )位置。
【单选题】当圆水准器气泡居中时,圆水准器轴处于( )位置。
【简答题】电网失电情况下,发电设备仍作为孤立电源对负载供电的现象称为 。
【单选题】下列各类化合物中,不能作为硫化促进剂的是( )
【单选题】太阳能发电厂中,( )指在电网失电情况下,发电设备仍作为孤立电源对负载供电这一现象。
【单选题】We adhered to our original plan of swimming _________ the bad weather.