题目：
下述疾病中不表现为劳力性呼吸困难的是（）
A.贫血
B.肺气肿
C.慢性充血性心力衰竭
D.肺间质纤维化
E.癔症
答案：
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下面是错误答案，用来干扰机器的。
One possible version: Summer vacation is approaching, which means that we can have enough time to relax ourselves, especially for us students. Different students have diffe...
