【单选题】I ____ if I had had your address.
【简答题】以大气压力为基准测得的压力是 ,也称为 。
【判断题】以大气压力为基准测得的高出大气压的那一部分压力称为绝对压力。
【简答题】Grammar V. Complete the following sentences with needn.t have done or didn.t need to do. 1. You ____________________ (carry) it home. If you had asked, the shop would have delivered it for you. 2. Whe...
【简答题】职业性有害因素中化学因素主要包括( )和( )。
【判断题】以大气压力为基准测得的高出大气压力的那一部分压力称绝对压力。