【单选题】下列有关预算定额的消耗量和单价,描述正确的是( )。
B.
临时停机、停电影响机械操作时间不属于机械台班幅度差
C.
预算定额基价包括人工费、材料费、机具费、管理费和利润
D.
预算定额基价是根据现行定额和当地的价格水平编制的,故不具备稳定性
【单选题】Computers are so popular in our country that every pupil knows _____ e-mails. [ ]
【单选题】《剑桥史》中这样记述: “1842年,《南京条约》取消了只准在广州进行中外资易和由广州特许的公行垄断商来进行中外贸易的限制,从而开始了国与国之间的外交关系。”这是因为《南京条约》的签订:( )
【单选题】Although I often send e-mails to Tom, I have never seen him _____________. [ ]
【单选题】I can send e-mails on the street when I wear _________.
A.
a coat with a computer
C.
clothes that can monitor our body
【简答题】内质网的标志酶是( ),溶酶体的标志酶是( ),过氧化物酶体的标志酶是( )。
【单选题】I prefer _____ e-mails to _____ letters. [ ]