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【简答题】
若系统中的某子模块需要为其他模块提供访问不同数据库系统的功能,这些数据库系统提供的访问接口有一定的差异,但访问过程却都是相同的,例如,先连接数据库,再打开数据库,最后对数据进行查询。针对上述需求,可以采用( )设计模式抽象出相同的数据库访问过程,该设计模式( )。 A.外观 B.装饰 C.桥接 D. A.可以动态、透明地给单个对象添加职责 B.为子系统定义了一个高层接口,这个接口使得这一子系统更加容易使用 C.通过运用共享技术,有效支持大量细粒度的对象 D.将抽象部分与它的实现部分分离,使它们都可以独立地变化
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举一反三
【单选题】what will happen if the dust aerosol layer develops?( )
A.
The Each will get extremely hot.
B.
The balance between the amount of heat absorbed from the Sun and the amount lost could hardly be maintained.
C.
The light of the Sun could no longer reach the surface of the Earth.
D.
Infrared radiation could no longer be transmitted from the Each to outer space.
【简答题】3 More sentences Read the following sentences that are frequently used and complete the matching exercise.
【单选题】Have you ever picked some beautiful vegetables for your dinner salad ________ that they are extremely bitter? [     ]
A.
to find
B.
finding
C.
found
D.
find
【单选题】为方便表达式的求解,在表达式两端加上“#”,那么在表达式3* 2^(4+2*2-6*3)-5求值过程中当扫描到6时,对象栈和算符栈为( ),其中^为乘幂。
A.
3,2,4,1,1;#*^(+*-
B.
3,2,8;#*^-
C.
3,2,4,2,2;#*^(-
D.
3,2,8;#*^(-
【简答题】Complete the sentences with the proper forms of the given words. 1. If you are not sure of the correct ___________ of the word, look it up in your dictionary. (pronounce) 2. The customer was _________...
【多选题】Tick (V) the sentences that are exclamations.
A.
How old are you?
B.
What a fine day!
C.
How time flies!
D.
What are you doing?
E.
How much money you spent!
F.
How do you do?
【单选题】Practice 3 Translate the sentences into Chinese. 8. These are just a few of the many different customs that are found in different cultures.
A.
不同的文化有不同的习俗。
B.
这些仅仅是不同文化中发现的许多不同习俗的一部分。
【单选题】The space animal theory would seem to indicate that_______.
A.
living creatures are extremely adaptable
B.
life in space is impossible for man
C.
the fittest creatures always survive
D.
life cannot exist in the depth of the sea
【简答题】六个空中交通管制单位
【判断题】Read the following sentences and decide whether they are compound sentences or not. Write "T or 正确" if they are and "F or 错误" if they are not. 3. That house is larger than the other one.
A.
正确
B.
错误
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