【单选题】I don‘t know when she ___ back, but give her the message if she comes in before two.
【单选题】—When did you go to the Palace Museum? —____________. [ ]
【判断题】单作用叶片泵的转子每回转1周,每个密封容积完成2次吸油和压油
【判断题】When wecompare two things, we show how they are different; when we contrast two things, we show how they are similar.
【简答题】It was two days later __________ they began to discuss my suggestion. A) when B) that C) what D) on which
【判断题】单作用叶片泵的转子每转 1周,每个密封容积完成2次吸油和压油。
【单选题】None of us called the police when the two cars collided, ____?
【单选题】When doves are about two weeks old, they are covered with grey feathers and are ready to try their wings.