对于含油量为2.8%(重)的微晶蜡,氢分压必须提高到()MPa,空速降至0.5~1.0h-1左右时,产品才能够达到要求。
A、9.8
B、8.0
C、7.2
D、2.5
参考答案:A
John is the only one of the students in our class that never ______ a mistake even when it is pointed out to him.
A.admit making
B.admits making
C.admit to make
D.admits to make
承包商计算索赔费用常用的方法是( )。
A.总费用法
B.修正的总费用法
C.单价法
D.实际费用法