单项选择题

A．Red.
B．Green.
C．Blue.
D．Purple,
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单项选择题
A．Their lack of concentration resulting from mental stress.B．The lack of consideration for them in equipment design.C．The probability of their getting excited easily.D．Their slowness in responding.
A．Their lack of concentration resulting from mental stress.
B．The lack of consideration for them in equipment design.
C．The probability of their getting excited easily.
D．Their slowness in responding.
填空题
In the 1970s, General Motors (GM) spent millions trying to keep the facility______, but productivity and quality were continually poor.
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