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【单选题】
伺服放大器部件JF1功能是什么A.
主电源输入
B.
外置放电电阻
C.
连接伺服电动机
D.
脉冲编码器反馈接口
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皮皮学刷刷变学霸
举一反三
【单选题】How did Natalie help the survivors?
A.
She gave her toys to the kids
B.
She took care of younger children
C.
She called on the White House to help
D.
She built an information sharing platform
【单选题】Leaving aside the question of how black holes generate the energy in gamma-ray bursts-cosmic explosions called GRBs-their sheer brilliance has posed a dilemma. So much radiation emanates from the GRB'...
A.
Though the forces which influence GRBs are now established, scientists have yet to establish their cause.
B.
Scientists have now established the role that kinetic energy plays in the existence of GRBs.
C.
Certain aspects of GRBs have finally allowed scientists to link them to specific kinds of collapsed stars.
D.
Though still perplexed by the cause of GRBs, scientists have discovered how they manage to escape the gravity of black holes.
E.
Fireballs can transform. explosive energy into observed radiation, as had long been hypothesized.
【单选题】患儿男,8岁。右手外伤后感染,右腋窝出现肿块,疼痛,伴发热、头痛2日。査体:体温39°C,右侧腋窝有一4cm直径大小的肿块,质韧、压痛、无波动感,皮肤红、肿、热。白细胞15×10 9 /L,中性粒细胞89%。具备以下哪项条件切开引流
A.
体温超过40℃
B.
感染性休克
C.
穿刺抽出脓液
D.
血培养阳性
E.
局部肿胀加重
【单选题】患儿男,8岁。右手外伤后感染,右腋窝出现肿块,疼痛,伴发热、头痛2日。查体:体温39°C,右侧腋窝有一4cm直径大小的肿块,质韧、压痛、无波动感,皮肤红、肿、热。白细胞15×109/L,中性粒细胞89%。【3-3】具备以下哪项条件切开引流
A.
体温超过40℃
B.
感染性休克
C.
穿刺抽出脓液
D.
血培养阳性
E.
局部肿胀加重
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