While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?()
A. Delivery check valve
B. Pump barrel
C. Tubing to the injector
D. Cam follower
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患者,男,26岁,农民。其晨起后突然自觉右侧阴囊胀痛、下坠,牵引少腹隐痛,触按左侧阴囊内容物肿大,阴囊皮色正常。若诊断为子痈,需下列哪项支持()
A. 透光试验阴性
B. 触诊睾丸肿大,压痛明显
C. 血象白细胞增高
D. 透光试验阳性
E. 血象白细胞正常
双相情感障碍患病率男女之比在各文化和种族中基本一致,是()
A. 1∶1.1
B. 1∶1.2
C. 1∶1.3
D. 1∶1.4
E. 1∶1.5