Companies usually _____ a number of experiments before a new product is launched.
Companies usually _____ a number of experiments before a new product is launched.
A、practice
B、control
C、carry
D、conduct
【正确答案】:D
【题目解析】:此题考查词意辨析。Practice实践、练习,control控制,carry携带,conduct进行、实施。选项D是正确的。【句子大意】公司在新品上市之前通常要做大量的实验。
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