【单选题】使用非特异性抗原进行梅毒螺旋体检测的实验方法是
【简答题】He didn’t have any money for a bike.(改为肯定句) He _________ __________ money for a bike.
【简答题】根据今天(4月4日)上机课内容,excel案例操作,将完成的案例提交上来。
【单选题】与慢性胃炎和消化性溃疡等密切关系的是( )
【多选题】联系房屋各层不同高度空间的垂直交通设施有( )
【单选题】He didn’t _____until 10 o’clock
【单选题】Last night Dad and Mum didn't come back home _____ I finished my homework. [ ]
【单选题】Last night Mr. Crook didn't come back at the usual time. ___, he met some friends and stayed out until midnight. [ ]