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【单选题】
下述哪项不是看板操作原则 ?A.
没有看板不能生产也不能搬运
B.
前工序只能生产取走的部分
C.
看板必须和实物一起
D.
看板数量越少越好
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反馈参考答案：
举一反三
【单选题】下列说法中不正确的是( )
A.
交流负反馈是指交流通路中的负反馈
B.
晶体三极管本质上是一个电流控制电流源器件
C.
发光二极管是一种将光信号转换成电信号的器件
D.
稳压二极管在稳压状态时，它的PN结处在反向击穿状态
【单选题】A good artist, like a good engineer, learns as much from ________ his success.
A.
his mistakes as
B.
his mistakes as from
C.
his mistakes from
D.
his mistakes from as
【单选题】John was good at his work and he was ()to general manager in his company.
A.
retrograded
B.
degraded
C.
upgraded
D.
downgraded
【单选题】A good manager identifies the interest of his employees _____ his own .
A.
to
B.
with
C.
for
D.
between
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