【单选题】Mr White, the principal, has made a great _________ to the growth of the school.
【单选题】______ a lot of money made the study abroad possible for him.
C.
Tom's having been saved
【简答题】指出下列钢件的最终热处理工艺并说明获得的组织 1 45钢的小轴(要求综合机械性能好) ; 2 60钢簧; 3 T12 钢锉刀。
【简答题】如果一个有向图中没有 ,则该图的全部顶点可能排成一个拓扑序列。
【单选题】----Tom has made great progress recently. ---- _________ and _________ .
A.
So he has, so you have
B.
So he has, so have you
C.
So has he, so have you
D.
So has he, so you have
【单选题】一般来讲,在所有液压泵中,( )的容积效率最小。
【简答题】5个变量可构成 个最小项, 全体 最小项 之和 为 。
【单选题】____ the help of the teacher, Tom has made rapid progress ____ his studies. [ ]
【单选题】Tom, who is always shy in public, has made some friends at school, ______ has pleased his parents.