臂架式起重机应设有力矩限制器和()
A、带电感应器
B、限位指示装置
C、幅度指示器
参考答案:C
患者男。1天前大量饮酒后出现腹痛,恶心,呕吐。查体:左上腹有横行呈带状压痛及肌紧张,左腰部皮下淤血而发蓝。该患者的诊断是 ()
A.急性坏死型胰腺炎
B.胆总管结石
C.急性胆囊炎
D.胰头癌
E.急性胃炎
What brings about the counter-clockwise swirling of the hurricane
A.The low-pressure area in the center of the storm.
B.The force of waves of water.
C.The trade winds.
D.The increasing heat.