【判断题】在数据库编程中,数据库连接池中的连接是用之不完,取之不尽的。
【简答题】已知某钢筋混凝土梁的计算跨度L0=6m,截面尺寸b×h=200mm×500mm,混凝土自重为25KN/m3,则该梁有自重引起的线荷载的标准值为
【单选题】_______Lisa _______Lucy may go with you because one of them must stay at home to take care of the dog.
【单选题】—May I borrow your pencil, please? —Yes, of course. Here are some and you can take ________ of them.
【单选题】----May I borrow your pen, Mike ? ----Yes, of course. Here are some and you can take ______ of them.