问题
选择题
An experienced doctor usually judges a patient’s illness according to the various________.
A．signs
B．symptoms
C．signals
D．marks
答案
答案：B
考查名词词义。sign信号，暗号；symptom症状，征兆；signal预兆，征象；信号；mark印，记号，符号。由句意可知B项正确。
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