【单选题】下列哪个机构,主要实现由往复的摆动变为步进的转动:
【单选题】Will you go to the Great Wall if it ____ fine tomorrow?
【单选题】— How do you usually go to work? — If it is fine, I _____ on foot. [ ]
【单选题】因购房人按揭购房但未能按期还款,而给贷款人造成损失的风险属于
【单选题】-Would you like out for a picnic tomorrow? -Yes, if the weather is fine tomorrow. [ ]