When he is faced with a dilemma sometimes, he usually makes a/an ________ decision by throwing a coin.
A．a(chǎn)rbitraryB．conservativeC．a(chǎn)ccurateD．cautious
A

試題分析：進(jìn)退兩難的時(shí)候，靠拋硬幣作出的決定是“隨意”的。conservative: 保守的；accurate: 精確的；cautious: 謹(jǐn)慎的。不合題意。arbitrary: 隨意的、隨機(jī)的。故A項(xiàng)正確。
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