A-A+
Young horses may develop a ______ cough before
问题详情
Young horses may develop a ______ cough before and during exercise, particularly when cold air is breathed in during warming-up exercise or under dusty conditions.
A．perpetual
B．permanent
C．chronic
D．sustained请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：近形近义题。chronic意为“慢性的；长期的”，强调延续时间长的，如achronicdisease(慢性病)；[A]perpetual“永久的；不断的”，强调稳定性和持久性；[B]permanent“永久的；不变的”，指总是处于相同的情况和地位，可长期持续下去，永久不变；[D]sustained“持续不变的；不间断的”。
