The accuracy of scientific observations and calculations is always ______ the sc

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问题 The accuracy of scientific observations and calculations is always ______ the scientist’ s time-keeping methods.

选项 A、at the mercy of
B、in accordance with
C、under the guidance of
D、by means of

答案 B

解析 at the mercy of任凭…摆布。in accordance with依照，与…一致。by means of依靠。under the guidance of在…的指引下。

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