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【多选题】
文化对教育的决定作用表现在A.
文化决定了教育的方法和手段
B.
文化传统使教育呈现出不同的特点
C.
文化决定了教育的领导权
D.
文化提供了教育的内容
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皮皮学刷刷变学霸
举一反三
【单选题】What is the difference between a unique constraint and a primary key constraint?
A.
A unique key constraint requires a unique index to enforce the constraint,whereas a primary key constraint can enforce uniqueness using a unique key of or nonunique index
B.
A primary key column can be NULL,but a unique key column cannot be NULL
C.
A primary key constraint can use an existing index ,but a unique constraint always creates an index
D.
A unique constraint column can be NULL,but primary key columns can not be NULL
【简答题】内毒素的主要化学成分是 ，其毒性主要是由 决定的。
【单选题】While the Pilot is maneuvering the vessel to a dock，what is the PRIMARY responsibility of the watch officer?
A.
Insure that helm and throttle orders given by the Pilot are correctly executed
B.
Judge the appropriateness of the Pilot's orders and countermand them if necessary
C.
Supervise the signaling and flag etiquette
D.
Record the bells and their times in the bell book
【简答题】起动时依据____确定基本喷油持续时间。
【单选题】For what primary purpose was the Aswan Dam built?
A.
Traffic.
B.
Irrigation
C.
Electricity.
【简答题】与G6DP缺陷有关的疾病是( )。
【单选题】What is the main idea of this passage?
A.
The difference between the primary school and the secondary school.
B.
The method that pupils get help from the teachers.
C.
The personal development of the pupils in the secondary school.
D.
The function of the secondary school.
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