【判断题】普通电子点火是比传统点火系统更为先进的点火系统,其特点是完全取消了断电器的触点。
【单选题】We students got lost in the forest and decided to remain ____we were and waited for the guide
【单选题】We waited and , but nothing happened.
【简答题】采用物价指数法评估进口设备所适用的价格指数是( )。
【多选题】HIV 抗体检测确认试验,目前我国最常用的方法不包括()