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实验题-2:根据 STC89C52 单片机片内 30H 单元内容( 00 或 01 或 02 或 03 )进行散转, 1 个数码管循环显示对应的数字。(为了便于观察你也可以增加一个循环,循环取分支变量,观察显示结果) ( 具体内容看实验二 )
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【简答题】The secret of s successful school __________ effective co-operation between professional leadship, the goverment and the local authority.A. lie down B. lie on C. lie to D. lie in
【单选题】The secret of a successful school consists in effective co-operation between professional leadership, the government and the local authority.
A.
lies down
B.
lies with
C.
lies in
D.
lies ahead
【简答题】制备聚乙烯醇的单体是什么?为什么?请写出制备聚乙烯醇工艺流程及各化学反应方程式。
【单选题】The successful operation of any engine or machine and ____ depend on effective lubrication.
A.
their no trouble period
B.
their freely trouble period
C.
its free trouble life
D.
its trouble-free life
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