考博考试

【单选题】 The accuracy of scientific observations and calculations is always ______ the scientist' s time-keeping methods.
A．at the mercy of
B．in accordance with
C．under the guidance of
D．by means of

网考网参考答案：B
网考网解析：
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。 查看试题解析出处>>