单项选择题
The company's training plan was designed to help the employees to improve their work habits and______.
A.proficiency
B.sufficiency
C.insufficiency
D.efficiency
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单项选择题
The laser represents a true marriage between science and technology, the men who devised it were______engineers and physicists.
A.spontaneously
B.simultaneously
C.instantaneously
D.homogeneously
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单项选择题
Although students may be in a______position, teachers shall treat them as equals.
A.subsidiary
B.submarine
C.subordinate
D.subsequent
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