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【多选题】
风险的构成要素是（ ）。A.
风险成本
B.
风险因素
C.
风险事故
D.
风险损失
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【简答题】带头结点的双循环链表L中只有一个元素结点的条件是：__________。【合肥工业大学1999三、3 2000三、2(2分)】
【单选题】对肝脏在物质代谢上的描述不正确的是
A.
肝脏是维持血糖浓度相对稳定的重要器官
B.
维生素D的活化需肝脏参与
C.
酮体及尿素的合成场所均为肝脏
D.
肝内合成胆汁酸是胆固醇的主要代谢去路
E.
肝脏的生物转化作用主要是解毒功能
【单选题】Trees of this kind are so __________ that they can been seen everywhere.
A.
usual
B.
ordinary
C.
normal
D.
common
【简答题】It was Sunday and Tom was staying home. After breakfast he went out into the garden and played quietly by himself. There were no kids around and he was used to playing alone quietly. He played with Bo...
【单选题】Trees of this kind are so ______ that they can be seen everywhere.
A.
common
B.
usual
C.
special
D.
normal
【单选题】This kind of animal is able to protect itself from danger in many years. ________, the colouring of its hide makes it almost invisible when it is feeding in the shadow of trees.
A.
First at all
B.
First of all
C.
In all
D.
At all
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