林护士准备给病人进行肌内注射,手可接触的无菌注射器及针头的部分是()
A. 针尖、空筒
B. 活塞柄、针梗
C. 乳头、针栓
D. 针梗、活塞轴
E. 针栓、活塞柄
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经10次2000万人的研究,各次均发现吸烟者冠心病的死亡率高于不吸烟的()。
A. 30%
B. 50%
C. 70%
在颐和园后山的苏州河中划船,远方的苏州桥主景,为两岸起伏的土山和美丽的林带所夹峙,构成明媚动人的景色。这属于造园手法中的()。
A. 抑景
B. 框景
C. 夹景
D. 添景
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?()
A. During operation at low speed
B. During operation at rated speed, but low power output
C. During acceleration
D. All of the above