糖尿病代谢紊乱的中心环节是()。
A.葡萄糖的摄取减少
B.胰岛素拮抗激素分泌增加
C.胰岛素生物作用绝对和相对不足
D.脂肪分解增强,酮体产生多
E.葡萄糖的氧化利用差
参考答案:C
His parents died in the strong earthquake, so he was _______by his grandmother.
A.grown up
B.taken up
C.make up
D.brought up
According to the regulations,what fire safety control feature is required in quick-closing shut off valves?()
A.Electrical cut off switch
B.A fusible link
C.Manual cut off switch
D.A water spray actuator