应用低分子右旋糖酐抗休克治疗的用量为()
A.300ml/d
B.500~1500ml/d
C.1000~1500ml/d
D.1500ml/d
E.2000ml/d
参考答案:B
They are always friendly, __ ? [ ]
A. are they
B. aren't they
C. do they
D. don't they
炉衬损坏的原因包括()。
A.钢水冲刷
B.炉渣冲刷
C.废钢撞击
D.急冷急热