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问题 单项选择题

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

答案

参考答案：C

选择题

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
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单项选择题

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
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