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【单选题】
关系数据模型的三个组成部分中不包括A.
关系的数据操纵
B.
关系的数据结构
C.
关系的完整性约束
D.
关系的并发控制
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反馈参考答案：
举一反三
【单选题】听力原文：M：I would like to move to the suburbs，but I don't have enough money to pay the high taxes． W：I wish you could。It's nice to live there． Q：Why isn't the man moving to the suburbs? (18)
A.
It's too expensive to hire taxies.
B.
He doesn't like the suburbs.
C.
He can't afford the high taxes.
D.
The rent is too high.
【简答题】金属切削过程中切削热的来源主要有两个，即（）和（）
【简答题】切削热的来源有哪些。
【简答题】Each room in this building has its own special __________.
【单选题】I'd like to go to Beijing by plane but I don't have got enough to pay for the ______.
A.
plane
B.
journey
C.
road
D.
way
【单选题】Each room in this building has its own special __________.
A.
link
B.
links
C.
feature
D.
features
【简答题】切削热的来源有( )、( )。总切削力可分解为( )、( )和( )三个切削分力。
【单选题】______ he can recover soon, I don't mind how much money I have to pay.
A.
So long as
B.
So far as
C.
In case
D.
When
【简答题】Each room in this building has its own special __________.
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