皮皮学，免费搜题
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【单选题】
青春期发育最早的特征是()。A.
性器官迅速发育
B.
第二性征迅速发育
C.
出现第二次生长突增
D.
内分泌系统功能活跃
E.
身高突增
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皮皮学刷刷变学霸
举一反三
【单选题】Mr White, the principal, has made a great _________ to the growth of the school.
A.
contribution
B.
progress
C.
invention
D.
protection
【单选题】______ a lot of money made the study abroad possible for him.
A.
Tom saved
B.
Tom has saved
C.
Tom's having been saved
D.
Tom's having 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】____ the help of the teacher, Tom has made rapid progress ____ his studies. [ ]
A.
For; at
B.
Of; for
C.
By; on
D.
With; in
【简答题】服务型旅游公共关系的内容有哪些？
【单选题】Tom, who is always shy in public, has made some friends at school, ______ has pleased his parents.
A.
who
B.
where
C.
that
D.
which
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