单项选择题

基础知识,章节练习,土木工程师（水利水电）现代技术基础,电气技术基础

A.40
B.14.14
C.31.62
D.20
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Which of the following is wrong about negative feedback? A、It is an important mechanism to ensure the accuracy of regulation. B、It destroy homeostasis. C、It can keep certain physiological functions relatively stable. D、Regualtion of temperature belongs to it.
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The primary barrier of a bulk carrier is formed by ______．A.the single skin side shell and the inner bottomB.deck strips，hatch covers and coamingsC.the vertically corrugated transverse watertight bulkheadsD.the single skin side shell between topside and hopper tanks，and the cross deck strips，hatch covers and coamings
A.A.the
B.deck
C.the
D.the
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