以下哪一项不属于周围血管疾病的常见症状和体征（）
A. 疼痛
B. 肿胀
C. 发热
D. 溃疡
E. 坏疽
Although we still have some problems to face,______our work has been successful.
A. by all means
B. in the long run
C. by and large
D. on the run
下列关于臁疮的叙述错误的一项是（）
A. 因经久站立或负担重物，造成下肢筋脉横解，青筋显露，瘀停脉络，久而化热而成
B. 好发于小腿中下1/3交界处(踝骨上9cm)之内、外侧
C. 患者多有下肢恶脉(静脉曲张)、慢性丹毒等病史
D. 多发于青年人
E. 溃疡前期，小腿下段轻度肿胀，内臁或外臁处皮肤青紫瘀斑或红褐色，渐至皮肤粗糙，脱屑，色素沉着，苔藓样变，轻微瘙痒
What, according to this passage, would be the major impact of the newer energy sources（）
A reduction of the fuel consumed by conventional power stations.
B. A reduction of the manpower required by conventional power stations.
C. The total replacement of conventional power stations.
D. The total replacement of conventional energy sources.
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